Because reality cannot be anything other than tautological.

That means a 1:1 relation to itself. What exists = What exists.

What exists changes. This is called time.

What existed, changed, into what exists now.

What you are, is part of that which exists.

What you are, was forced to exist.

Your parents had sex.

The sexual material coupled and computed in such away, along with the exact intakes of material sustenance, to build your body.

And then more time happened, and more time happened.

And reality still equals reality, as it always has an always will.

Now, get lost in the wonder of "now".

Watch all of this complex shit with detached amusement. Let it play before your senses. Enjoy it, "good" or "bad"... it just is.

Enjoy it while it lasts.