I have a grand theory for why we are all basically, completely nutzo. We are conscious beings who know that we and everyone we love, will die. AND, although we highly value our lives, our own particular life doesn't really add up to a hill of beans in the Universal picture.
Now, I do think you can get your head around all of this, but that doesn't mean you aren't a crazy human being too. You can try to be humble, realize life is a big, grand, adventure, and not really about you. You do your best and let the torpedoes fly. And yes, you will cease to exist at some point, but, well, so what?! You know, you try to modulate the crazy.
How?
Be here now. Lean to the light. Live with grace and humility. Don't take things too seriously. Do your best not to make yourself, or others, crazy. Remember Gravity, Common Sense, Logic, Practicalities, Logistics, Love, Humanity, Goodness.
That's pretty much it. And it's probably enough. I mean, to quote from the movie "Babe." "That'll do pig!"