How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it except the pleasure of seeing it.
无论一个人被认为多么自私,他的本性中显然存在某些原则,这些原则使他对别人的命运感兴趣,并将他们的幸福视为自己的必要,尽管他从中除了看到它时的快乐外一无所得。
存在的每一刻,人要么成长更多,要么退缩更少。
生活中最好的东西是免费的。
进步的真正衡量标准不在于知识的积累,而在于其应用于人类的改善。
敢于在古人成就面前一争高低,这是有志气;在今人的成绩面前不虚心,这是没有气量。