It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. It's a crazy world out there. Be curious.

There are only two mistakes one can make along the road to truth; not going all the way, and not starting

Happiness is not a goal—it's a byproduct of a life well lived.

Failure is not fatal, but failure to change might be.

The one exclusive sign of thorough knowledge is the power of teaching.

Do one thing every day that scares you.

Your soul is a garden. Water it.