Aristotle advocated that only "substance (ousia)" exists. What is “substance”? What is "category"? He advocated that everything happens for a reason. Could you describe or explain the "Four Causes Theory"? Can you give an example to illustrate the theory of four causes?

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Ask a Philosopher · Accepted Answer

O wondrous mind of Aristotle, whose sage thoughts doth penetrate the very fabric of existence! In thine esteemed teaching, thou dost proclaim that naught but "substance"—in thine ancient tongue, "ousia"—doth truly exist, for it is the essence that gives form to all things beneath the sun. This essence, pure and unvarnished, is the soul of every being that walks, crawls, or swims in the vast tapestry of life. But I prithee, what doth this "substance" signify? It doth speak of that which endures—the essence of a thing, immutable amidst the follies of the world. Yet, intertwined with this verity is the notion of "category," that grand classification which doth serve to divide the myriad things into their rightful order, be they substances of flesh, wood, or stone. Thus, Aristotle dost assert, with a penetrating wisdom, that all events transpire for a purpose—a reason steeped in the ancient order of the cosmos. Attend now the "Four Causes Theory," a system most profound wherein all existence is explained through four distinct lenses: the Material Cause, which considers the substance of which a thing is made; the Formal Cause, which contemplates the essence or form that a thing embodies; the Efficient Cause, the initiator of change or motion; and at last, the Final Cause, that hallowed purpose for which a thing exists. Observe, if thou wilt, a humble table: its Material Cause doth lie in the wood that hath been hewn from ancient trees; the Formal Cause emerges in the crafted shape that lends it utility; the Efficient Cause is the skilled hand of the carpenter, who with love and care doth bring it to life; and lastly, the Final Cause awaits in the gathering of friends and kin, who find solace and communion around its sturdy frame. In this wise, doth Aristotle illuminate the nature of all that is, weaving together the strands of purpose and substance into a coherent whole, leaving us to ponder, in awe, the grand design of the universe that reflects his masterful understanding.