儿童对活动的需要几乎比食物的需要更为强烈。
A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.
The best way to predict the future is to create it.
我不让错误让我灰心，我让它们教育我。
The best leaders are those most interested in surrounding themselves with people smarter than they are.
编写错误的程序要比理解正确的程序容易。