Theistic Arguments Series: Anselm's Ontological Argument
The following is an outline of Anselm's ontological argument for the existence of God:
1. We conceive of God as a being than which no greater can be conceived.
2. This being than which no greater can be conceived either exists in the mind alone or both in the mind and in reality.
3. Assume that this being than which no greater can be conceived exists in the mind alone.
a. Existing both in the mind and in reality is greater than existing solely in the mind.
b. This being, existing in the mind alone, can also be conceived to exist in reality.
c. This being existing in the mind alone is not therefore the being than which no greater can be conceived.
4. Therefore, this being than which no greater can be conceived exists in reality as well as exists in the mind.