解释：怀揣珍宝的人，不要在晚上行走；担负大任的人，不能对敌人掉以轻心。

The system produces needs faster than it can satisfy them, and thus it perpetuates itself.

成功的关键是专注于目标，而不是障碍。

世界充满了小小的乐趣；诀窍在于发现它们。

心灵应通过对自然的研究被引导到对上帝的认识。

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.