If the general picture however of a big bang, followed by an expanding universe is correct, what happened before that? Was the universe devoid of all matter and then the matter suddenly, somehow created? How did that happen? In many cultures the customary answer is that a god or gods created the universe out of nothing. But if we wish to pursue this question courageously, we must of course ask the next question, where did God come from? If we decide that this in an unanswerable question why not save a step and conclude that the origin of the universe is an unanswerable question? Or, if we say that God always existed, why not save a step and conclude that the universe always existed? There's no need for a creation, it was always here. These are not easy questions. Cosmology brings us face to face with the deepest mysteries. With questions that were once treated only in religion and myth.
Obviously, we know that there must be something, because we're here. If there were nothing, we couldn't ask the question. But why? Why is there something? Why is the universe not a featureless void? Why does our universe have matter and not only energy? It might seem surprising, but given our current theories and measurements, science cannot answer those questions.
The thinker who accepts the absolutism of the metaphysically given recognizes that it is his responsibility to conform to the universe, not the other way around.
Whenever men expect reality to conform to their wish simply because it is their wish, they are doomed to metaphysical disappointment.