In mathematics, you don't understand things. You just get used to them.
I always try to find a way to win even when I'm not playing my best.
Agriculture is the most honorable of professions, for it sustains life itself.
The past is always with us, for it feeds the present.
To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.
积极情绪不是微不足道的奢侈品，而是最佳功能的关键必需品。