All the effects of nature are only the mathematical consequences of a small number of immutable laws.

如果你感到不安，猜猜看？世界上的其他人也是如此。不要高估竞争对手而低估自己。你比你想象的更好。

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.

你脑袋里有大脑，鞋子里有双脚，你可以选择任何方向前进。