Enough (n.) is never too little, and not-enough is never too much.
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Enough (n.) is the same in every age, though what counts as too much changes with the century.
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Enough (n.) is the goal no rich person has attained: someone who has a great deal desires more, which shows he does not yet have enough.
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Enough (n.) is what the rich man never reaches — a stopping-point; he who has much desires more, proof that he has not yet acquired enough.
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Enough (n.) is a citizen's share: the Roman commander refused as much land as he could plow around in a day, saying the state needs no citizen who needs more.