I was seldom able to see an opportunity until it had ceased to be one.

In a world filled with hate, we must still dare to hope. In a world filled with anger, we must still dare to comfort. In a world filled with despair, we must still dare to dream. And in a world filled with distrust, we must still dare to believe.

The beauty of mathematics lies in its ability to simplify complex phenomena.

I'm not a person who likes to be ordinary.

Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.

奥林匹克主义旨在创造一种生活方式，其基础是在努力中找到的快乐、好榜样的教育价值以及对普遍基本道德原则的尊重。

A vida é uma festa que não se repete.