Sustainability isn't an option; it's a responsibility we owe to future generations.

Success is not final, failure is not fatal: It is the courage to continue that counts.

The true measure of a civilization is how it treats its weakest members.

Duty is the most sublime word in our language. Do your duty in all things. You cannot do more. You should never wish to do less.

The most powerful tool for improving decisions is feedback.

怀疑是信仰的开始。

我们现代的头骨里装着一个石器时代的心智。

The best way to predict the future is to invent it.

"The future belongs to those who believe in the beauty of their dreams."

The character and destiny of a group are often determined by its inferior elements.

The great ideological battles between liberalism and communism, or between democracy and authoritarianism, have been replaced by a general consensus on the desirability of liberal democracy.