He who does not bait his hook fishes in vain.
More French Proverbs:
Mastiff never liked greyhound.French
Don't harness the donkey and the horse together.
French
To enjoy life is worth so much more than it costs.
French
Something is better than nothing.
French
All the treasures of the earth can't bring back one lost moment.
French
He'll swear through an inch board.
French