One half the world knows not how the other half lives.
More French Proverbs:
It is well to leave off playing when the game is at its best.French
All state, and nothing on the plate.
French
He who has no health has nothing.
French
You easily lend bread to the one who has flour.
French
He expects that larks will fall ready roasted into his mouth.
French
There is one who kisses, and the other offers a cheek.
French