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  ...the unbounded confidence in mathematical results has been somewhat shaken by a wave of mathematical skepticism which gained momentum through some of the popular writings of H. Poincare and Bertrand Russell. As instances of expressions which might at first tend to diminish such confidence we may refer to Poincare's contention that geometrical axioms are conventions guided by experimental facts and limited by the necessity to avoid all contradictions, and to Russell's statement that Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.   "
The mathematical skepticism which such statements may awaken is usually mitigated by reflection, since it soon appears that philosophical difficulties abound in all domains of knowledge, and that mathematical results continue to inspire relatively the highest degrees of confidence. The unknowns in mathematics to which we aim to direct attention here are not of this philosophical type but relate to questions of the most simple nature. It is perhaps unfortunate that in the teaching...   Russell, Bertrand

Excerpt from Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 · This quote is about mathematics · Search on Google Books to find all references and sources for this quotation.

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