  In the third part of the second essay, Crescas analyzes the true meaning of these three beliefs and asks whether we can prove them. He comes to the conclusion that he can prove the existence of God. In his opinion the only way to prove the existence of God is via the need for a first cause. If every single thing in the universe is caused, their existence is only possible (just as is their inexistence) and so we need a first cause that necessitates their existence as opposed to their  non-existence.[15]