Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.

最终，我们只会后悔没有抓住的机会。

Happiness and unhappiness depend upon the opinion we have of things.

我认为你必须有一种愿意接受失败的态度，这是创新的一部分。

如果不改善个人，就无法希望建立一个更美好的世界。为此，我们每个人都必须为自己的进步而努力，同时为全人类承担共同的责任。

The success of liberal democracy depends on the ability of its institutions to adapt to changing circumstances.