我们生命中最美好的时刻不是被动的、接受的、放松的时刻...最美好的时刻通常发生在一个人自愿努力完成一项困难而有价值的事情时，身体或精神被拉伸到极限的时候。

There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.

The challenge in computer graphics is to simulate the complexity of the real world with the simplicity of mathematical models.