The brain is a kind of computer.

Every soul needs rest and relaxation.

能源危机是一个可以解决的问题——如果我们现在行动的话。

You must change nothing in your writing without absolute necessity. If it is necessary， then change with simplicity.

寻找一个对我而言是真理的真理，寻找一个我愿意为它而活、为它而死的理念。