El temps és lineal o no lineal?

Einstein's block universe theory vs quantum mechanics arrow of time

The intersection of Albert Einstein’s relativity and quantum mechanics presents one of the most profound tensions in modern physics: the fundamental nature of time. **Position of the Discipline** In general relativity, time is inextricably woven with space into a four-dimensional continuum. This mathematical framework naturally implies a deterministic "block universe" (often called *eternalism* in philosophy), where the past, present, and future coexist with equal reality. In this view, the subjective "flow" of time is merely a psychological artifact. However, quantum mechanics actively challenges this static paradigm. At the quantum scale, the probabilistic behavior of particles and the irreversible collapse of quantum states during measurement strongly suggest a fundamental asymmetry, or an "arrow of time". Consequently, modern physics is divided. While the block universe remains popular among cosmologists because of relativity's success, physicists focused on quantum mechanics and thermodynamics argue that the physical universe must accommodate a dynamical, objective directionality. **Key Figures and Texts** Einstein remains the definitive architect of the block universe. Weeks before his death in 1955, he summarized this view, stating: "For us believing physicists, the distinction between past, present and future is only a stubbornly persistent illusion". Cosmologist Max Tegmark popularizes this by comparing the block universe to a "physical DVD"—the events of the film are already encoded in the structure, even if they appear to unfold dynamically to the viewer. Countering this, physicists like Nicolas Gisin utilize intuitionist mathematics to argue that quantum mechanics requires a "creative" time where information is continuously generated. Others, such as Tim Koslowski and Julian Barbour, propose that the arrow of time is a natural emergent property of gravity clustering matter into states of higher complexity. **Distinctive Concepts** The debate relies on distinct terminology. The **block universe** demands a globally deterministic, time-symmetric reality. The **arrow of time** refers to the observed asymmetry between past and future, traditionally explained by the **entropy camp** (which points to the Second Law of Thermodynamics) or by the irreversibility of **quantum measurement**. To bridge the gap, some philosophers like Tim Maudlin advocate for modified frameworks, such as the **growing-block model**, which accepts a static past but preserves an open, unwritten future.

• nih.gov
• quantamagazine.org
• stackexchange.com
• quantamagazine.org
• nautil.us
• utm.edu

cosmic cycles of Maha Yugas and Kalpas in Puranic cosmology

In the tradition of Hinduism and Vedanta, particularly within Puranic cosmology, time is fundamentally non-linear. Rather than a finite progression, the tradition views time as "eternal, cyclical, and consciousness-governed, unfolding in vast cycles that reflect the pulsation of the cosmos itself". These cosmic cycles trace the continuous, divine processes of creation, preservation, and dissolution. The foundational unit of cosmic time is the *Maha Yuga* (or *Chatur Yuga*), a period spanning 4.32 million human years (12,000 "divine" years). Each *Maha Yuga* comprises four sequential ages: *Satya*, *Treta*, *Dvapara*, and *Kali Yuga*. The texts detail that "each yuga's length and humanity's general moral and physical state within each yuga decrease" according to a 4:3:2:1 ratio, reflecting a progressive decline in *Dharma* (righteousness) and spiritual purity. Cosmological scale expands exponentially into massive, nested hierarchies. Seventy-one *Maha Yugas* form a *Manvantara*, an epoch overseen by a Manu, the progenitor of humanity. Fourteen *Manvantaras*—along with transitional junction periods known as *Sandhyas*—constitute a *Kalpa*. A *Kalpa* equals 1,000 *Maha Yugas* (4.32 billion Earth years) and represents "one full day of Brahma, the cosmic creator". At the end of each *Kalpa*, the universe undergoes a *Pralaya* (partial dissolution) for an equal duration, forming Brahma's night. Ultimately, after a complete lifespan of 100 "Brahma years" (roughly 311.04 trillion human years), a *Mahapralaya* (Great Dissolution) occurs, returning all manifest universes back to the unmanifest absolute. Key texts like the *Bhagavata Purana*, *Vishnu Purana*, and the ancient astronomical treatise *Surya Siddhanta* codify these frameworks. The *Vishnu Purana* establishes that these immense timeframes operate relative to divine consciousness, emphasizing that "a Kalpa constitutes a day of Lord Brahma". These cycles are not merely abstract mathematics; they deeply bind physical cosmology to spiritual evolution, providing a profound perspective on the "ephemerality of individual human lives and even of civilizations".

• blogspot.com
• wisdomlib.org
• wikipedia.org
• rudraksha-ratna.com
• mahavidya.ca
• scribd.com

Zen Master Dogen's Shobogenzo Uji being-time and non-linear presence

Within Sōtō Zen Buddhism, the 13th-century founder Zen Master Dōgen (1200–1253) fundamentally redefined the relationship between existence and temporality. His magnum opus, the *Shōbōgenzō* ("Treasury of the True Dharma Eye"), serves as the philosophical backbone of the tradition. In its deeply influential fascicle titled *Uji* (translated as "Being-Time" or "Time-Being"), Dōgen outlines a non-dualistic, non-linear approach to presence and impermanence. The concept of *Uji* collapses the conceptual distance between what things are and when they are. In conventional frameworks, time is perceived linearly—as an external container in which objects exist, flowing continuously from the past into the future. Dōgen’s Zen strictly rejects this dualism. Instead, it asserts that "time itself is being, and all being is time". Every entity, action, and instance of impermanence is an active manifestation of time itself. Rather than viewing impermanence as a tragic passing of the present, Dōgen embraces it as the continuous, luminous actualization of Buddha-nature. Through *zazen* (seated meditation), the practitioner embodies this non-linear presence, realizing they do not simply exist *in* time, but rather they *are* time. Dōgen explicitly dismantled the illusion of fleeting, externalized time. In *Uji*, he sets his foundational premise: "The so-called 'sometimes' (*uji*) means: time (*ji*) itself already is none other than being(s) (*u*) are all none other than time (*ji*)". He cautions practitioners against missing true presence by treating time purely as a sequential loss, writing, "Do not think of time as merely flying by... If time is really flying away, there would be a separation between time and ourselves". Ultimately, *Uji* teaches that by dropping the notion of time as a passing metric, one awakens to a radical presence where all of existence is intimately connected in an absolute, dynamic now.

• wikipedia.org
• zenkannon.org
• medium.com
• wikipedia.org
• everydayzen.org
• awakeningtoreality.com
• wisdomexperience.org

temporal perception in Lurianic Kabbalah and the concept of the eternal now

In Jewish mysticism, specifically within 16th-century Lurianic Kabbalah, temporal perception is deeply intertwined with the cosmological origins of the universe. For the tradition's central figure, Rabbi Isaac Luria, time is not an absolute, pre-existing reality, but a created phenomenon resulting from the divine's interaction with the finite. At the foundation of this framework is the concept of *Ein Sof* (The Infinite), which refers to the boundless, unknowable essence of God existing utterly beyond spatial or temporal limits. Because the infinite light of *Ein Sof* initially filled all existence, there was no room for a finite, time-bound reality. To facilitate creation, Luria introduced the doctrine of *Tzimtzum*—a primordial "contraction" or deliberate self-withdrawal of the divine light (*Ohr Ein Sof*). This withdrawal cleared a conceptual void (*chalal panui*) in which the universe, along with the dimensions of space and time, could emerge. Consequently, time is viewed as a byproduct of divine limitation; as Jewish mystics note, "There is no time prior to the tzmitzum, as the tzimtzum is what allows time to exist". Despite the human experience of a linear flow of past, present, and future, the Kabbalistic perception of ultimate reality operates as an "eternal now" (*nunc stans*). From the vantage point of the Divine—often represented by the Tetragrammaton (YHVH) and the name *Ehyeh* ("I Will Be")—time is experienced as the "compresence of the three temporal modes". The past, present, and future exist simultaneously in an immutable flux. Rather than being a mere chronological sequence, mystical time represents a transcendent state where "the temporal is eternalized and the eternal temporalized". Ultimately, Lurianic Kabbalah posits that while human consciousness is bound to the sequential unfolding of the physical world, the underlying spiritual reality remains anchored in the timeless unity of the *Ein Sof*, where all historical and future moments converge into a singular, eternal present.

• thehiddenorchard.com
• wikipedia.org
• gettherapybirmingham.com
• medium.com
• medium.com
• vdoc.pub
• brill.com

neural correlates of subjective time dilation and non-linear temporal processing

Within neuroscience and cognitive psychology, time perception is understood not as a direct sensory input, but as a highly distributed, active construction of the brain. When investigating the profound question of how we experience reality, this discipline approaches temporal distortions—such as subjective time dilation and non-linear temporal processing—through the lens of attentional resources, emotional arousal, and predictive neural modeling. A foundational concept in this tradition is the "pacemaker-accumulator model," which posits that heightened arousal (such as fear) increases the rate of an internal biological pacemaker. This results in a greater accumulation of temporal "ticks," causing the perceived duration to expand. A well-documented manifestation of this is the "oddball effect," where unexpected or highly salient stimuli appear to last longer than standard, repetitive events. Key neuroimaging experiments by researchers such as Marc Wittmann, Virginie van Wassenhove, and Peter Tse have rigorously tested these temporal illusions. In seminal functional magnetic resonance imaging (fMRI) studies, researchers utilized dynamic visual stimuli to isolate the neural correlates of temporal distortion. They demonstrated that "subjective time dilation was observed for the looming stimulus but not for the receding one". In other words, an object appearing to move toward the observer—an intrinsic threat cue—reliably slows down subjective time, while an object moving away does not. This dilation effect is deeply tied to conscious awareness. Brain scans reveal that the time dilation triggered by looming stimuli strongly activates the anterior insula and cortical midline structures, which are key nodes in the brain's default mode network. Because these neural areas govern subjective awareness, researchers interpret this as definitive evidence that "time perception is related to self-referential processing". Furthermore, consciousness studies increasingly emphasize "non-linear temporal processing" and predictive coding. Rather than passively reacting to external stimuli in a strictly time-forward, deterministic fashion, the brain generates anticipatory signals and continuously processes multiple probability states based on internal models. Ultimately, neuroscience frames subjective time not as a rigid clock, but as a malleable, non-linear interface designed to orient the "self" within an unpredictable environment.

• arabpsychology.com
• medium.com
• naturphilosophie.co.uk
• nih.gov
• nih.gov
• wikipedia.org
• frontiersin.org
• nih.gov
• scienceblogs.com

Australian Aboriginal Dreamtime concept of every-when vs Western linear time

In contrast to the Western conception of time—which is typically viewed as linear, chronological, and moving unidirectionally from a closed past to a distant future—Australian Aboriginal traditions conceive of time as cyclical, unified, and intimately tied to place. This profound philosophical framework is most commonly introduced to Western audiences through the concept of the "Dreaming" or "Dreamtime," which serves as an English translation for complex Indigenous language terms such as *Tjukurrpa* (Western Desert), *Jukurrpa* (Warlpiri), and *Alcheringa* (Arrernte). The position of this tradition was famously articulated for Western academia by Australian anthropologist W.E.H. Stanner in his seminal 1956 essay, "The Dreaming". Stanner recognized that Western historical and temporal frameworks were inadequate to describe an Indigenous reality where ancestral creation narratives are not relegated to antiquity. To bridge this conceptual gap, Stanner coined the neologism "everywhen". He explained that the Dreaming is a timeless, eternal present, stating: “One cannot ‘fix’ The Dreaming in time: it was, and is, everywhen”. Within the *every-when*, the ancestral spirits who shaped the physical world, instituted sacred laws, and created life did not simply disappear into the past. Instead, their actions are continually unfolding in the present. This collapses the Western spatial and temporal divide; past, present, and future coexist simultaneously, and history is physically embodied within the landscape rather than on a timeline. Contemporary First Nations educators note that the English word "Dreamtime" can be problematic, as it risks minimizing a lived reality to a fictional "bedtime story". In truth, the *everywhen* operates as an active, living "spiritual GPS". It is an integrated operating system for life that guides social ethics, ecological stewardship, and kinship, demonstrating a sophisticated, dynamic worldview where creation remains an ever-present reality.

• harvardmagazine.com
• nma.gov.au
• commonground.org.au
• fish.asn.au
• warrenellis.ltd
• medium.com
• wikipedia.org
• pageplace.de

McTaggart's The Unreality of Time and A-theory vs B-theory metaphysics

In analytic metaphysics, the debate over the fundamental nature of time is heavily shaped by J.M.E. McTaggart’s seminal 1908 article, "The Unreality of Time". Operating within the emergence of early analytic philosophy, McTaggart sought to prove that time is an illusion because the ways we logically determine and describe temporal events are inherently contradictory. The conceptual bedrock of this discipline relies on McTaggart’s distinction between two ways of ordering events: the A-series and the B-series. The **B-series** organizes events using static, permanent, and tenseless relational properties, such as "earlier than" and "later than". In this series, temporal relations never change; if an event is "ever earlier than N, it is always earlier". Conversely, the **A-series** classifies events dynamically according to their tensed properties: as being "past", "present", or "future". McTaggart argued that time essentially requires change, which can only be supplied by the dynamic passage found in the A-series. However, he asserted that the A-series is logically contradictory because it requires every event to possess mutually incompatible properties—every event must simultaneously be past, present, and future from different perspectives, triggering a vicious infinite regress. Since the A-series is contradictory and the B-series alone lacks true change, McTaggart concluded that reality is atemporal. This framework ignited the contemporary A-theory versus B-theory debate in the philosophy of mind and metaphysics. **A-theorists** (such as A.N. Prior, who pioneered modern tense logic) uphold the objective reality of temporal passage, asserting that the transient flow of past, present, and future is an irreducible, dynamic feature of reality. In contrast, **B-theorists** (like Hugh Mellor) reject the objective reality of tense, adopting an eternalist ontology where all moments co-exist equally in a static "block". B-theorists argue that all truths about time can be reduced to permanent B-series statements, demonstrating that objective temporal relations suffice to explain change "without any illusory 'flow'". More than a century later, McTaggart’s paradox remains a central, unresolved challenge in contemporary theories of time.

• wikipedia.org
• grokipedia.com
• wikipedia.org
• nd.edu
• medium.com
• globethics.net

Ibn Arabi's metaphysics of perpetual creation and the nature of the moment

In Islamic mysticism, specifically within the Sufi metaphysics of the 13th-century Andalusian philosopher Muhyiddin Ibn 'Arabi, the nature of time and existence is defined by the doctrine of perpetual creation (*tajdid al-khalq*). Rooted in the paradigm of *Wahdat al-wujud* (the Unity of Being), Ibn 'Arabi posits that God alone is absolute reality or pure *Wujud* (Existence). The cosmos, by contrast, is an ongoing, dynamic manifestation of Divine attributes. At the center of this cosmology is the concept of "immutable entities" (*a'yan thabita*)—the infinite potentials or ontological roots lying latent within God's knowledge. According to Ibn 'Arabi, creation is not a singular event *ex nihilo* in the distant past; rather, it is an eternal process where God momentarily clothes these entities in the "robe of existence". Time itself has "no wujud in its entity"; it is merely a relationship organizing the sequence of events. At every instant, or with every Divine breath, the universe is extinguished into non-existence and re-created anew. Crucial to this worldview is the Akbarian principle that "There is no repetition in [God's] self-disclosure" (*la takrar fi'l-tajalli*). Because the Divine potentials are infinite, no two moments of creation are ever exactly alike. In his seminal texts, such as the *Futuhat al-Makkiyya* (The Meccan Revelations) and the *Fusus al-Hikam* (The Ringstones of Wisdom), Ibn 'Arabi asserts that "everything other than God... is re-created at each instant". Time is thus not a continuously flowing line, but a succession of discrete, atomic "Nows" suspended entirely by the continuous act of Divine will. This vision adapts Ash'arite theological atomism (the perpetual creation of accidents) into a mystical framework. By viewing every moment as an independent manifestation, this tradition dissolves the illusion of a self-sustaining material world. The external cosmos is but a fleeting shadow of the Real (*al-Haqq*). As Ibn 'Arabi states regarding this profound ontological intimacy: "Glory to Him who created all things, being Himself their very essence". Ultimately, the past has vanished and the future is non-existent; only the Eternal Now is real.

• stanford.edu
• scribd.com
• thecollector.com
• wikipedia.org
• ibnarabisociety.org
• naqshbandistore.com
• smonad.com
• wordpress.com