Ibn Sina · Theology
Ibn Sina’s deceptively simple distinction - between <em>what</em> a thing is and <em>that</em> it is - which reshaped a thousand years of metaphysics.
Consider any thing - a horse, a triangle, a mountain. You can ask two quite different questions about it. First: what is it? - its nature, its definition, the kind of thing it is. Ibn Sina calls this its essence (mahiyya, literally ‘what-it-is-ness’). Second: does it exist? - whether there actually is such a thing in reality. Ibn Sina calls this its existence (wujud). His deceptively simple but revolutionary claim is that these two - what a thing is, and that it is - are genuinely distinct, and that recognising their distinction unlocks the deepest questions of metaphysics.
From this, Ibn Sina draws a striking conclusion: in every created thing, existence is accidental to the essence - not part of what the thing is, but something that ‘happens to’ the essence, bestowed on it from outside. A horse’s essence does not include ‘existing’; the essence is neutral, in itself, as to whether it exists or not. So when a horse does exist, its existence must come from a cause that confers existence on the essence - tipping the neutral essence from mere possibility into actuality. This is exactly why contingent things need causes: their essences don’t contain their own existence, so existence must be given to them. The essence-existence distinction is the metaphysical root of the whole contingency argument for God.
Ibn Sina’s distinction lets him map all of reality with elegant precision. Consider any essence ‘in itself,’ abstracted from whether it exists: it is, in itself, neutral - neither necessarily existent nor necessarily non-existent, but merely possible. Then reality divides into three modes. Some essence is necessary in itself - the Necessary Existent, God, whose essence is existence. Everything else is possible (contingent) in itself, but divides further: some possibles are necessary through another - once their cause exists, they must exist (given the cause, the effect necessarily follows); and a possible considered without its cause is merely possible, hovering between being and non-being. This precise modal map - necessary-in-itself, possible-in-itself-but-necessary-through-another, merely possible - orders the whole of existence around the single distinction between essence and existence.
This is the opening of the lesson. The rest — the dialogue, the primary source, and the recall — is in the app.
You learned that Ibn Sina distinguishes essence from existence. Explain the distinction, why he says existence is ‘accidental’ to essence, and what follows for God, in your own words.
Leads to Martin Heidegger.
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