The only limit to our realization of tomorrow is our doubts of today.
A poet is a nightingale, who sits in darkness and sings to cheer its own solitude with sweet sounds.
诗人是一只夜莺，坐在黑暗中用甜美的声音歌唱来鼓舞自己的孤独。
知识的最大敌人不是无知，而是知识的幻觉。
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.
知识越少越准确，知识越多，疑惑也就越多。