You think you know when you can learn, are more sure when you can write, even more when you can teach, but certain when you can program.

You can't go back and change the beginning, but you can start where you are and change the ending.

The method of psychology must be rigorously empirical.

A verdadeira revolução é a que transforma o coração do homem.

The most important questions of life are, for the most part, really only problems of probability.

Architecture is a form of art that must be experienced with the body.

编程语言中最重要的东西就是名字。没有一个好名字，一门语言就不会成功。我最近发明了一个非常好的名字，现在正在寻找一门合适的语言。

解释：要紧紧抓住时机不能错过，错过了也不能延误太久。