Not worth is an example that does not solve the problem.
Those who covet much suffer from the want.
Grammatici certant et adhuc sub iudice lis est. - Grammarians dispute, and the case it still before the courts.
The sad dislike those who are cheerful, and the cheerful dislike the melancholy.
Seize the day, put no trust in the morrow!
Nature is harmony in discord.