决定劳工工资的不是雇主的仁慈，而是雇主之间的竞争。
It is not the benevolence of the employer that determines the wages of labor， but the competition among employers.
To find out what one is fitted to do, and to secure an opportunity to do it, is the key to happiness.
I am not interested in solving problems that are already solved.
有时，生活中最困难的部分不是痛苦，而是等待。
最好的老师是那种建议而不是教条化，并激发听众自我教学愿望的人。
移民可以对创新和生产力产生积极影响。