Nothing is sufficient for the person who finds sufficiency too little. Epicurus
He who is unable to live in society, or who has no need because he is sufficient for himself, must be either a beast or a god. Aristotle
If every man took only what was sufficient for his needs, leaving the rest to those in want, there would be no rich and no poor. Basil of Caesarea
A hint is sufficient for the wise. Irish Proverb
Sufficient for the day is the evil thereof. French Proverb
A word is sufficient for the wise. Latin Proverb