Ingratitude is a kind of weakness; the clever are never ungrateful.
More French Proverbs:
A fault, once denied, is twice committed.French
A person's reputation is like his shadow-sometimes it follows and sometimes it precedes him; and sometimes it is smaller and sometimes it is bigger than him.
French
After a feast a man scratches his head.
French
For a web begun God sends thread.
French
He who teaches, learns.
French
You don't have to kill the chicken to get eggs.
French