The Five Ways 1. Rationalism - the position according to which matters of faith may be evaluated rationally, e.g. we may seek to find reasons for believing in the existence of God. Atheists believe that God does not exist. Agnostics suspend belief in God's existence or nonexistence and remain neutral on the question.
Events cause other events in the world.
Series of causes must be finite. Therefore, God exists. So, nothing can cause itself. If the causal series were infinite, there would be no first cause. So, the causal series cannot be infinite.