The Origin of the Universe

The deepest question of philosophy is why do contingent beings exist at all? By a contingent being, a Nina being exists, but which might not have existed. The universe must be found in an external cause that exists beyond time and space by a necessity of its own nature. But abstract objects don't stand in causal relations - the number seven has no effect upon anything. And therefore it follows that the most plausible explanation of the universe is God.