You recognize the saint by his miracle.
More French Proverbs:
By working in the smithy one becomes a smith.French
You do not always have to believe what you see.
French
A cow does not know what her tail is worth until she has lost it.
French
Unless Hell is full, no lawyer will ever be saved.
French
He who cannot speak well of his trade does not understand it.
French
He has great need of a fool who makes himself one.
French