The most dangerous phrase in business is "We've always done it this way."

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt, and the profoundest wisdom to know when it ought to be resisted, and when it be obeyed.

Innovation in forestry begins with respecting traditional wisdom.

"You can't control everything, but you can control how you react to things."

在暴君有权杀死一个国家的权利被证明之前，一个国家在必要时杀死暴君的权利永远不会被怀疑。

Tennis is a brutal sport. There are no draws. If you lose, you’re out. You have to be ready to accept that.