一切都在流動，一切都在變化，沒有永恒不變的東西。
譯文：人生得一知己必須要對知己問心無愧，讀書人多讀書，一定要學(xué)以致用。賞析：做人做事憑著良心方能服眾，才不會招致怨憤和禍患。讀書的目的就是學(xué)以致用，我們不能讀死書，死讀書，我們要讓書中的知識來指導(dǎo)我們的生活。
A smooth sea never made a skilled sailor.
The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy, and finally oblivion.