In Russia, severity of laws is compensated for by their non-enforcement.

The true test of a mathematical idea is its ability to inspire further questions.

In the end, the success of any technology is determined by its ability to solve real-world problems.

The heart is a fragile thing, easily broken, but also capable of great strength.

Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

如果没有机械的帮助，一天的劳动不足以生产一磅棉花。

我们完全可能是在从错误的侧面考察世界，要找到有关世界的正确答案，也许需要改变视点、从世界的另一面考察它，即从心理内部而非心理外部考察。