The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

"To write is to breathe freely in a world that constantly tries to suffocate truth."

The walls of the educational system must come down. Education should not be a privilege, so the children of those who have money can study.

未经审视的人生不值得过。

解释：处于安全环境时要考虑到可能出现的危险，考虑到危险就会有所准备，事先有了准备就可以避免祸患。

The language of mathematics is universal; it transcends all cultural barriers.

大国总是在寻找机会以牺牲对手为代价来获取权力，如果他们认为使用武力会带来利益，他们就会使用武力。