Not worth is an example that does not solve the problem.
In labouring to be brief, I become obscure.
The ear of the bridled horse is in the mouth.
How slight and insignificant is the thing which casts down or restores a mind greedy for praise.
Many brave men lived before Agamemnon; but, all unwept and unknown, are lost in the distant night, since they are without a divine poet (to chronicle their deeds).
Learned or unlearned we all must be scribbling.