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The maxim of Cleobulus, "Mediocrity is best," has been long considered a universal principle, extending through the whole compass of life and nature. The experience of every age seems to have given it new confirmation, and to show that nothing, however specious or alluring, is pursued with propriety or enjoyed with safety beyond certain limits.

Samuel Johnson (1825). “The Rambler: A Periodical Paper, Published in 1750, 1751, 1752”, p.68
The maxim of Cleobulus, Mediocrity is best, has been long considered a universal principle, extending through the whole compass of life and nature. The experience of every age seems to have given it new confirmation,