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Peter Kreeft is a Roman Catholic Apologist and professor of philosophy at Boston College.

20 Arguments for the Existence of God

Kreeft believes he can prove the existence of God. He documents 20 arguments for the existence of God on his website.

The Argument from Change

This argument seems to be a variation of The First Way. It goes something like:

flowchart LR A(All changing things require an external, unchanging cause.)--> B B(The universe is a changing thing.)--> C C(Therefore, the universe requires an external, unchanging cause. This cause is God.)