The longer I live the more I see that I am never wrong about anything, and that all the pains I have so humbly taken to verify my notions have only wasted my time.

人的首要职责是为自己思考。

一本优秀的传记是过去与现在之间的桥梁。

译文：脾气暴躁，性格偏执，多是短命之人；言语尖酸刻薄，一定是福薄之人。赏析：为人处世一定要温和低调，接人待物要温柔敦厚。脾气暴躁，戾气太重，说话尖酸刻薄，一定会招致很多人的讨厌。被人讨厌，自然身边缺少朋友，何谈有福气呢。