He who does not when he can, cannot when he will.
More Italian Proverbs:
A ragged sack holds no grain, a poor man is not taken into counsel.Italian
Secrecy is the beginning of tyranny.
Italian
The more you stroke the cat's back the more set sets up her tail.
Italian
A fool finds no pleasure in understanding but delights in airing his own opinions.
Italian
Break the legs of an evil custom.
Italian
Have two strings to your bow.
Italian