The evidence of existence of universe and everything in it, is the proof.
There 4 possible explanations. 1) Universe come from nothing. 2) Universe created itself. 3) Universe always was there. 4) God created it. Nothing can come from nothing. In order to Universe to creat itself universe must exist, so universe cannot ex... ist and not-exist at the same time. Think your mom giving birth to herself. There finite number of past events, so universe cannot always be there. We left only with one explanation