He is the wisest man who does not think himself so.
More French Proverbs:
One must be either anvil or hammer.French
All the keys do not hang at one girdle.
French
Cherries are bitter to the glutted blackbird.
French
Mention not a rope in the house of one whose father was hanged.
French
He does not guard himself well who is not always on his guard.
French
Man is the only mammal that can be skinned more than once.
French