投资者要学会从失败中吸取教训，不要让失败打击信心。

质量不是一时的风尚；它是一种哲学。

The individual is reduced to a negligible quantity, perhaps less in his consciousness than in his habits and in the unconscious adjustments of his life.

过去是知识的巨大源泉，但也是幻觉的巨大源泉。

【译文】将知识默记在心，学习时，不感到满足，教人时，不感到倦怠，这三方面我做到了哪些呢？