Let him who is cold blow the fire.
More French Proverbs:
The one-eyed are kings in the land of the blind.French
Travellers from afar can lie with impunity.
French
It is a double pleasure to deceive the deceiver.
French
There once was a good mother-in-law but the wolf gobbled her up.
French
Ask my comrade, who is as great a liar as myself.
French
The doctor is often more to be feared than the disease.
French