The uniform， constant， and uninterrupted effort of every man to better his condition， the principle from which public and national as well as private opulence is originally derived.

Don't wait for permission to innovate - just start.

数学的力量在于它的抽象性，使我们能够看到不立即显现的模式和联系。

你没有第二次机会，生活不是任天堂游戏。