As Nobel laureate physicist Frank Wilczek has put it, The answer to the ancient question, 'Why is there something rather than nothing?' would then be that 'nothing' is unstable. ... In short, the natural state of affairs is something rather than nothing. An empty universe requires supernatural intervention--not a full one. Only by the constant action of an agent outside the universe, such as God, could a state of nothingness be maintained. The fact that we have something is just what we would expect if there is no God.
~ Victor J. Stenger