If an urn lacks the characteristics of an urn, how can we call it an urn?
The only people who cannot change are the most wise and the most stupid.
When a nation or family is about to flourish, there are sure to be happy omens; and when it is about to perish, there are sure to be unlucky omens.
Looking at small advantages prevents great affairs from being accomplished.
It is when those who are not strong enough have made some moderate amount of progress that they fail and give up.
If a man keeps cherishing his old knowledge so as continually to be acquiring new, he may be a teacher of others.