犯罪不是由贫困引起的，而是由人们合法和非法收入之间的差距引起的。

最重要的是保持思考，保持质疑。

"A good book is the best of friends, the same today and forever."

La palabra es el arma más poderosa que tenemos para cambiar el mundo.

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

决策的质量不是由结果来衡量，而是由做出决策的过程来衡量。

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.