A Zen master might say to you that you cannot have the foreground without the background. There cannot be a space without something occupying that space. There cannot be life without death, and there cannot be death without life. In the same breath, there cannot be SOMETHING without NOTHING. They are inseparable. The Ying and Yang is a symbol for existence, and its two spirals represent the two great winds of creation: Something and Nothing. You cannot pry them apart and you cannot isolate one without taking the other into account, therefore, the universe has always existed, as existence cannot occur without non-existence and vice versa.