To overcome the anxieties and depressions of contemporary life, individuals must become independent of the social environment to the degree that they no longer respond exclusively in terms of its rewards and punishments.

出自北齐·颜之推《颜氏家训·文章》。书写文章要尊崇“三易”的原则，即文章内容要清晰明了，这是第一项。书写的文字要简单概要，这是第二项。书写的段落要读起来朗朗上口这是第三项。

The flame of the spirit burns brightest in solitude.

The pursuit of mathematical knowledge is a journey that never ends; there is always more to discover and understand.

你的耳朵听不见是因为我。