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Aquinas 

St. Thomas Aquinas, Commentary on the Metaphysics of Aristotle, Lesson 1

1. [Aristotle] says, first, that the desire to know belongs by nature to all men.

2. Three reasons can be given for this. The first is that each thing naturally desires its own perfection. Hence matter is also said to desire form as any imperfect thing desires its perfection. Therefore, since the intellect, by which man is what he is, considered in itself is all things potentially, and becomes them actually only through knowledge, because the intellect is none of the things that exist before it understands them, as is stated in Book III of The Soul; so each man naturally desires knowledge just as matter desires form.

3. The second reason is that each thing has a natural inclination to perform its proper operation, as something hot is naturally inclined to heat, and something heavy to be moved downwards. Now the proper operation of man as man is to understand, for by reason of this he differs from all other things. Hence the desire of man is naturally inclined to understand, and therefore to possess scientific knowledge.

4. The third reason is that it is desirable for each thing to be united to its source, since it is in this that the perfection of each thing consists. This is also the reason why circular motion is the most perfect motion, as is proved in Book VIII of the Physics, because its terminus is united to its starting-point. Now it is only by means of his intellect that man is united to the separate substances, which are the source of the human intellect and that to which the human intellect is related as something imperfect to something perfect. It is for this reason, too, that the ultimate happiness of man consists in this union. Therefore man naturally desires to know.

Reflection Question

What do you see as the main points of contrast between Augustine and Aquinas?

Attributions

The full book of Augustine's Confessions Translated by Rev. Dr. E.B. Pusey can be found online with Google books. The entirety of Aquinas' Commentary translated by John P. Rowan can be found in the Priory archives. A special thanks to Michael Arts for his assistance in compiling this abridgment.