If a man be gracious and courteous to strangers,it shows he is citizen of the world.
如果一个人对陌生人能温文儒雅,这表明他是一个世界公民。——弗朗西斯·培根(英国思想家)
Be nice to people on your way up because you'll meet them on your way down.
上坡时,对别人好一些,因为下坡时,你还会遇见他们。——威尔逊·米茨纳(美国演员)