Don’t teach fishes to swim.
More French Proverbs:
He carries fire in one hand, water in the other.French
One hour's sleep before midnight is better than three after it.
French
He expects that larks will fall ready roasted into his mouth.
French
Fair, good, rich, and wise, is a woman four stories high.
French
Set your sail to the wind.
French
If the fire does not burn you the smoke will blacken you.
French