“To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.”

Douter de tout ou tout croire, ce sont deux solutions également commodes, qui l'une et l'autre nous dispensent de réfléchir.
Preface, Dover abridged edition (1952), p. xxii
Science and Hypothesis (1901)

Original

Douter de tout ou tout croire, ce sont deux solutions également commodes, qui l'une et l'autre nous dispensent de réfléchir.

, 1902

Adopted from Wikiquote. Last update March 8, 2022. History

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Henri Poincaré 49
French mathematician, physicist, engineer, and philosopher … 1854–1912

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