Why do people become firemen, policemen, soldiers, freedom fighters, all activities that cannot be explained in terms of self-interest alone?

不可能只用拿工资的理由，就能完全解释为什么总有人愿意做,消防员，警察，军人和争取自由的斗士？

耶鲁公开课 - 政治哲学导论课程节选

The Hobbesian state was intended to secure the conditions of life, even a highly civilized and cultivated life but one calculated in terms of self-interest and risk avoidance.

霍布斯眼中的国家旨在,保护人民的生命财产安全,即使是那些虽开化有教养却是为一己私利的人,也应当受到国家的保护。

耶鲁公开课 - 政治哲学导论课程节选

If you do it in monthly terms your interest rate is r/12 because there are twelve months in a year.

如果是每月还款那么月利率是r/12,因为一年有12个月

耶鲁公开课 - 金融市场课程节选