The only way to achieve the impossible is to believe it is possible.

失意之事，大多是由于洋洋得意所致。

The leather industry must evolve or risk becoming obsolete.

I work hard, and I do good, and I’m going to enjoy myself. I’m not going to let you restrict me.

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is probably not important to mathematics.

Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them - and then, the opportunity to choose.