The only way to do great work is to love what you do.

暴力是无能者的最后避难所。

废物只是我们尚未学会珍惜的资源。

对冲低油价的最佳方法是降低盈亏平衡成本。

从生活中学习，从书籍中学习，从他人中学习。

The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.

如果不给儿童提供帮助，如果忽视他的环境，那他的精神生命将会处于持续的危险之中。