Anselm's Proof for the Existence of God
Proslogion Ch. 2
- Suppose there is something in the understanding, of which nothing greater can be conceived.
- However, if this something is only in the understanding, then there is something which is greater than it - namely, the same thing in reality. This is because something that is real is greater than something that exists only in the understanding.
- However, there is a contradiction if the thing doesn't exist, for then it would be something of which nothing greater can be conceived, but there would be something greater.
- Therefore, if this something exists in the understanding, it must exist in reality.
Proslogion Ch. 3
- We can conceive of a being which cannot be conceived not to exist, and it is greater than one which can be conceived not to exist.
- Now, if the [than which nothing greater can be conceived], can be thought to not exist, it negates its own nature (ie., there is something greater than it).
- This is a contradiction. Therefore, there is a being than which none greater can be conceived, and it cannot even be conceived to not exist. This is God.