Proof of God

The reason we can not use reason alone to prove the existence of God is that we can not use reason alone to define God. Before we can prove any thing we must clearly and precisely define our terms. If we are allowed to make up a "definition" of God than we can easily prove that God exist. If we define God as love than all we have to show is that love exist to prove God exist. If we define God as the ground of being than all we have to show is that anything exist to prove God exist. If we define God as the cause of the Big Bang than if we prove the Big Bang happened we prove God exist.