I would have liked to hear him prove that.
Alright. If we put this another way. If God did exist, it would be in a kind of infinite state. He knows all, sees all, hears all, is all. But if a being is in an infinite state it cannot then think since thought is a process where we reach an idea or conclusion. A being who knows all conclusions, the past the present and future can't think. If God is infinite then he does not want or feel need since he already has infinity. This God wouldn't need to create this world or us Humans. God would have no need for us.
Heres an extract from Robert Green Ingersoll's Why I Am An Agnostic:
"We are told he is infinitely wise. If he is, he does not think. Thought is a ladder - a process by which we reach a conclusion. He who knows all conclusions cannot think. He cannot hope or fear. When knowledge is perfect there can be no passion, no emotion. If God is infinite he does not want. He has all. He who does not want does not act. The infinite must dwell in eternal calm."