Mathematics is the science which draws necessary conclusions.

Memoir read before the National Academy of Sciences in Washington, 1870.

[after proving Euler's formula *e ^{π i}* = -1 in a lecture]

Gentlemen, that is surely true, it is absolutely paradoxical; we cannot understand it, and we don't know what it means. But we have proved it, and therefore we know it is the truth.

Quoted in E Kasner and J Newman

JOC/EFR February 2006

The URL of this page is:

http://www-history.mcs.st-andrews.ac.uk/Quotations/Peirce_Benjamin.html