I divide all readers into two classes: Those who read to remember and those who read to forget

A well-ordered life is like climbing a tower; the view halfway up is better than the view from the base, and it steadily becomes finer as the horizon expands

If happiness truly consisted in physical ease and freedom from care, then the happiest individual would not be either a man or a woman; it would be, I think, an American cow

In a start-up company, you basically throw out all assumptions every three weeks

If you develop the absolute sense of certainty that powerful beliefs provide, then you can get yourself to accomplish virtually anything, including those things that other people are certain are impossible