对验证的渴望是可以理解的，但不能总是得到满足。

You can't be afraid to fail. It's the only way you succeed.

The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behaviour, the more ethical concerns are raised regarding their use in the service of man—whether this be in entertainment, as ‘pets,’ for food, in research laboratories or any of the other uses to which we subject them.

The key to good design is understanding forces.

The purpose of mental activity is to guide action.