Perhaps the concept of a beginning is a limitation of our own? Either way you approach it, there must have been something, somewhere, that started everything. Did a singularity exist forever back in time and suddenly became our universe? Is it part of a constant and recurring process, where a universe is birthed and dies and is then reborn? Is it part of a different type of constant process, where universes are churned out of some eternal universe-making factory? Is it the creation of a sentient being who herself has always just existed? Either everything must come from something, in which case reality itself seems impossible, or something was somehow borne of nothing, or something was always there and spends eternity spitting out additional somethings.
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould