在我看来，如果你或我必须在两种思想或行动之间做出选择，我们应该记住我们的死亡，并努力生活，使我们的死亡不会给世界带来任何快乐。
It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.
做出伟大工作的唯一途径是热爱你所做的事。
The world loved man when he smiled. The world became afraid of him when he laughed.
The essence of science is to ask the right questions.
生命的历史是联系的历史。