The only limit to our realization of tomorrow is our doubts of today.

Part of what you must learn is how to handle mistakes and new facts that change the odds.Life, in part, is like a poker game wherein you have to learn to quit sometimes when holding a much-loved hand.

每一项科学发现都应该以其对人类福祉的贡献来衡量。

写作是一种乐观的行为。如果你觉得它不重要，你就不会费心去做。