We can be thankful to a friend for a few acres, or a little money; and yet for the freedom and command of the whole earth, and for the great benefits of our being, our life, health, and reason, we look upon ourselves as under no obligation.

Doubt is a pain too lonely to know that faith is his twin brother.

What really motivates people at Facebook is building something that's worthwhile, that they're going to be proud to show to friends and family.

We always get bored with those whom we bore.

Some things just can't be described. And stepping onto the moon was one of them.