“Wisdom is not additive; its maximum is that of the wisest man in a given group.”
Glory Road (1963)
Context: Democracy can't work. Mathematicians, peasants, and animals, that's all there is — so democracy, a theory based on the assumption that mathematicians and peasants are equal, can never work. Wisdom is not additive; its maximum is that of the wisest man in a given group.
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes

“Minimum information given with maximum politeness.”
Instructions to press secretary Pamela Turnure; Quoted in A Hero for Our Time (1983) by Ralph G Martin; sometimes rendered : "I want minimum information given with maximum politeness."
The Personality of Jesus (1932)
Context: None of the three ways of dealing with social injustice can entirely prevent or remove human suffering. Resistance by violence tends to increase and intensify suffering; inaction or failure to exert effective restraint perpetuates the misery of the victims of crime or exploitation; non-violent coercion likewise often results in suffering. The policy of wisdom is to use that method which involves a minimum of suffering, and which offers a maximum of redemption.

Harijan (17 February 1940)
1940s

“The wisest man is he who is certain he is not.”
Le plus sage est celui qui ne pense point l'être.
Satire 4
Satires (1716)

“And he is oft the wisest man
Who is not wise at all.”
The Oak and the Broom.
Bartlett's Familiar Quotations, 10th ed. (1919)

“He has the wisdom of an old man, but his body is at its prime”
Source: Seven Against Thebes (467 BC), line 622 (tr. Herbert Weir Smyth)
“The weakest spot in every man is where he thinks himself to be the wisest.”
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 532.

“Nor is he the wisest man who never proved himself a fool.”
Stanza 124
Locksley Hall Sixty Years After (1886)