Experience is often the most valuable thing you have to offer.

You will not find your passion in things and you will not find your passion in money. The more things and the more money you have, the more you will look around and use that as the metric and there will be someone with more.

Read at least one book a month. This is self-serving, obviously. It's a proven fact that people who read buy more books than people who don't read. In truth, I wish you'd read ten books a month, or at least buy that many.

People are more important than things.

Give yourself permission to dream. Fuel your kids' dreams too. Once in a while, that might even mean letting them stay up past their bedtimes.

When you're screwing up and nobody says anything to you anymore, that means they've given up on you.

I understand the arguments about how the billions of dollars spent to put men on the moon could have been used to fight poverty and hunger on Earth. But, look, I'm a scientist who sees inspiration as the ultimate tool for doing good. When you use money to fight poverty, it can be of great value, but too often, you're working at the margins. When you're putting people on the moon, you're inspiring all of us to achieve the maximum of human potential, which is how our greatest problems will eventually be solved. Give yourself permission to dream.