Everything that exists must have a cause. Nothing can cause itself because to do so it would need to be existed before it existed! There must, therefore, have been something that was the first ‘causer’ was God. Proof 2
Proof 2 Everything must have a cause if it exists. Before something is made, something must have been before that. This was God.
Proof 2 I agree with this because if something exists it needs something else before that to be made. So, the only explanation for this is God.