Invisible harmony is better than visible.
The people must fight on behalf of the law as though for the city wall.
Things of which there is sight, hearing, apprehension, these I prefer.
It is better to conceal ignorance than to expose it.
All things flow, nothing abides. You cannot step into the same river twice, for the waters are continually flowing on. Nothing is permanent except change.
Though wisdom is common, yet the many live as if they had a wisdom of their own.