Well I could say its logic. But to elaborate, the universe is filled with possibilities because it exist because it wouldn't be able to exist any other way with contradictions. In the universe something can't be heating and getting cold at the same time. So platform for this universe is that A is A and it has no contradictions. And that's how elements are stable. I'm not a scientist but everything happens in the spectrum of logic. A house is on fire, there's gasoline inside, boom an explosion. The likeness of you having electricity in your anatomy is a mystery to me. But everything has a causality too it. Like a user posted earlier no one knows the origin of life. But the laws of the universe are that there is no contradictions that exist in the universe. Only in other aspects in life like emotions. A entity is defined by it's characteristics and as long as one entity does not overlap with another. All things are possible. Science is consistent, and there is a nature to how things come to be.