Hello good ILP people,
In a recent thread I created “The first way - Aquinas’ argument from motion”, I presented Aquinas’ first way of demonstrating the existence of God. This argument arrives at a being of Pure Act necessary to explain change within the universe. In this thread, Xunzian sensibly asked what makes this being of Pure Act God, and therefore makes Aquinas’ first way an argument for God, rather than an argument about Pure Act. This post will attempt to show that a being of Pure Act corresponds to the orthodox God, as St Thomas has elucidated.
As a quick excursion, let me just mention one thing. Richard Dawkins, the poor fellow, makes the claim on page 101 of The God Delusion (after a very brief and poor summary of Aquinas’ five ways) that there is “absolutely no reason to endow that terminator with any of the properties normally ascribed to God”, where the “terminator” here mentioned in the Pure Act/Being that Aquinas’ five ways arrive at. However, there are literally hundreds of pages of arguments to ascribe the orthodox properties of God to this Pure Act within the works of St Thomas, and unfortunately Dawkin’s engages with none of them.
First, a being of Pure Act is therefore a being with no potentiality whatsoever. If something has no potential, it is unchanging - for there is no potentiality to actualise, whereby the reduction of potency to act is the source of change in space-time (i.e. an electron in a lower energy orbit of a hydrogen atom has the potential to be excited into a higher orbit - this potential is actualised by an incident photon and therefore a change takes place). Time is a concept based around change - therefore a Being which is unchanging is therefore timeless or eternal. This gives us one attribute : Eternal
Secondly, all matter is capable of change and therefore has potentiality. Because a being of Pure Act has no potentiality and is therefore unchanging, said being is also immaterial. This gives us another attribute: Immaterial
Third, because the being of Pure Act is the source of all actuality (see the thread on the first way), the being is the source of all actual things - in other words, the being is the source of the universe. Therefore, at the very least, the being of Pure Act has a massive amount of power. Can we say that this being is “all powerful”? Aquinas makes the statement “the more actual a thing is the more it abounds in active power” - an example might suffice to demonstrate this. Say a ball has the potential to be in motion - the more this potential is actualised (i.e. the faster the ball is moved by something) the more it is able to actualise other things. Therefore, something which is Pure Act is purely, unlimited actuality and is therefore “all powerful”. This gives us another attribute: All powerful
Fourth, because the being of Pure Act has no potential, there cannot be many beings of Pure Act, but only one. Take this reductio ad absurdum: Say there are two beings of Pure Act, however, in order for them to be two separate things, they must have some difference (otherwise they would be the same thing). However, if they have some difference, this would mean something would have some potentiality actualised that the other did not, which is absurd (both beings are supposed to be Pure Act). This gives us another attribute: One-ness
Fifth, the being of Pure Act can be found to be perfect and wholly good. This one is perhaps the most complex of the arguments, and I can only give it a very brief overview which will not do it justice. First, Pure Act can be considered to be Pure Being. Something actual is only actual to the extent that it has existence and therefore being. Something which is potential does not exist and is therefore non-being. Therefore, a being which is Pure Act, which has no potentiality, can also be considered Pure Being. Now, the conceptions of perfection and good-ness only make sense in respect to the adherence of something to some ideal, or to its essence. For instance, a perfect triangle is one whose edges are entirely straight. In the same respect, a triangle drawn with a ruler and compass is better or “more good” one drawn purely by hand, because it conforms more to a triangles essence. In Aquinas’ view, the good is more broad than just moral good, which is a certain “species” of good if you like. For instance, whenever something actualises a potentiality that is its specifying potentiality (that is, the potentiality of something that makes it what it is) this is a good. For instance, the specifying potentiality of an acorn is its potential (under the right conditions) to form an oak tree. This potentiality is what separates it from other things under its genus. Now it is good for an acorn to turn into an oak tree, resulting in an increase in being and actuality. It follows therefore, that the being which is complete actuality, would also be perfectly good. This gives us the final attribute: Perfect and wholly good.
In summary then, the one being of Pure Act is Eternal, Immaterial, All powerful, and perfect/wholly good. This is a very short overview of the arguments that Aquinas has presented to show that the being with Pure Actuality, whose existence is demonstrated in the first way, is what we know as God.