Every atom that makes up all that we are, once spent billions of years drifting across the vastness of space. Long before there was any such thing as a year, before there was time, as we know it. Born from the explosion of a star, propelled across an immeasurable distance, to eventually coalesce around our Sun, to form this planet, and all that's on it.
Ego really is such a delusion. Siddhartha couldn't have known just how right he really was.
or, as Krauss put it,
The amazing thing is that every atom in your body came from a star that exploded. And, the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: You are all stardust. You couldn’t be here if stars hadn’t exploded, because the elements - the carbon, nitrogen, oxygen, iron, all the things that matter for evolution - weren’t created at the beginning of time. They were created in the nuclear furnaces of stars, and the only way they could get into your body is if those stars were kind enough to explode. So, forget Jesus. The stars died so that you could be here today.
- "A Universe From Nothing" by Lawrence Krauss
Funny how there's this impulse to put an almost religious significance to it. It really is amazing, how learning the complexities of how things work just blows anything religion proposes out of the water. Reality is just so far beyond anything we could have imagined.