The liar is not believed when he speaks the truth.
More Italian Proverbs:
Gold does not buy everything.Italian
Softly, softly, catchee monkey.
Italian
There is a deep sea between saying and doing.
Italian
A jade eats as much as a good horse.
Italian
It's a bad mouthful that chokes.
Italian
Who moves, picks up, who stands still, dries up.
Italian