Abraham Maslow

If you think only of evil, then you become pessimistic and hopeless like Freud. But if you think there is no evil, then you're just one more deluded Pollyanna.

If you only have a hammer, you tend to see every problem as a nail.

Work is that which you dislike doing but perform for the sake of external rewards. At school, this takes the form of grades. In society, it means money, status, privilege.

Well, I actually wrote her a letter a couple of days ago congratulating her. The tone I tried to convey in the letter is, look, you are a part of a great American historical process.

We are looking for highly technical, enthusiastic and capable entrepreneurs who have a healthy disregard for the impossible, and that's not always easy to find.

If you're not having a good time, find something else that gives you some joy in life.