Space
During these past few weeks, I spent quite some time staring at the mountains in the distance. They fascinate me. At night, I'd look up and see the shadows of those giants, just a few miles away. I'd imagine how cold it was up there, how windy, how deathly.
Not only we live in the only planet capable of hosting us, but it is within a very thin section of Earth that we live in: barely 3 miles from sea level to the highest settlement.
Time
If you were to spin a roulette of time, with numbers from the beginning of the Universe until its end, what are the chances that the ball would fall on your lifetime? Beyond impossible.
Existence
What about our own existence? If our parents had sex a mere seconds earlier or later, we wouldn't be here. The odds of our parents to exist and meet were even lower. It keeps getting less and less likely the higher you go.
Today is impossible
We live in an impossible part of the Universe, at an impossible time, and we are the product of an impossible chain of events.
Today is impossible and yet, it's happening.
PS: I'm working on a project about these issues and I think a lot about it.