A good swimmer is not safe against drowning.
More French Proverbs:
Let every one mind his own business, and the cows will be well tended.French
Even the strongest person will find his master.
French
He who holds the handle of the frying-pan turns it as he pleases.
French
Every one bears his cross.
French
Vice hides under a cloak of virtue.
French
Leave well alone.
French