If liberty means anything at all, it means the right to tell people what they do not want to hear.

领导力在于做出艰难的决定并坚持它们，即使这些决定不受欢迎。

Just the discipline of having to put your thoughts in order with somebody else is very useful thing.

可持续性不仅是一种趋势，更是我们对下一代的责任。