Empty sacks will never stand upright.
More French Proverbs:
A good bone does not always come to a good dog.French
Nothing looks more like an honest man than a villain.
French
Fortune can take from us only what she has given us.
French
Love Bertrand love his dog.
French
A hawk's marriage: the hen is the better bird.
French
It is merry in hall when beards wag all.
French