Islamic Philosophy / Falsafa

Time is infinite and relational — it is the measure of motion, constituted by the relations among moving celestial and sublunary bodies. The cosmos is eternal: it had no beginning and will have no end, because the Necessary Existent emanates necessarily and timelessly. Avicenna and Averroes both defended the eternity of the world against the Kalam theologians. Time is continuous, linear, and uni-directional: change proceeds from potentiality to actuality in an irreversible direction. Freedom is deterministic in the strong sense: everything that exists, exists necessarily given its full set of causes; the Necessary Existent emanates the First Intellect by logical necessity, not by choice.

Space is finite and relational — constituted by the spatial relations among bodies rather than existing as an independent container. The cosmos is a finite sphere bounded by the outermost celestial sphere, beyond which there is neither void nor place. Curvature is curved: the celestial spheres are nested concentric shells, and the structure of space reflects this spherical geometry. Locality is local: bodies interact through contiguous contact and the mediation of celestial influences that propagate through the spheres.

Matter is infinite and substantival — prime matter (hayula) is the eternal, formless substrate that receives the forms emanating from the Active Intellect. It is co-eternal with the Necessary Existent, not created from nothing: the cosmos has always existed as the necessary result of divine emanation. Matter is conserved: the material substrate persists through all transformations of generation and corruption in the sublunary world. It is local: material substances occupy determinate places within the nested celestial spheres.

The human observer is a rational soul joined to a material body, situated at a single moment and a single place in the sublunary world. Knowledge begins in sense perception but is perfected through conjunction (ittisal) with the Active Intellect — the lowest of the celestial intellects, which illuminates the human mind and enables it to grasp universal, necessary truths. Avicenna’s "flying man" thought experiment demonstrates that the soul can know itself independently of the body, suggesting that the intellect transcends material conditions. Knowledge once genuinely acquired is retained permanently; the perfected intellect survives the body’s corruption. Physicality is both: the soul is embodied during life but the rational part is separable and immortal. Agency is active: the philosopher must cultivate intellectual virtue through sustained study and contemplation; conjunction with the Active Intellect is the supreme human achievement. Multiple observers share a common cosmos and can verify philosophical truths through demonstration.

Energy is infinite and substantival — the emanative causal power that flows necessarily from the Necessary Existent through the hierarchy of intellects and celestial spheres to the sublunary world. This causal outpouring is eternal and unceasing: the Necessary Existent emanates necessarily, not by temporal act, and the cosmos has no beginning in time. Conservation holds: the total causal power of the cosmos is constant, sustained by the unchanging nature of the Necessary Existent. Dispersibility is irreversible: causation flows in one direction — from the Necessary to the contingent, from intellect to matter, from actuality to potentiality — and this hierarchy is fixed and unalterable.

Information is substantival and conserved — the forms (suwar) that constitute intelligible reality are eternal objects of the Active Intellect’s knowledge. When the human intellect achieves conjunction with the Active Intellect, it apprehends these forms directly and participates in an eternal, indestructible body of knowledge. Information is continuous because the emanative hierarchy is a continuous chain of intelligibility from the Necessary Existent down to prime matter.