…the doctrine he called Pragmatism, namely, that every concept (as distinguished from a generalized sensation, such as ‘red’) is equivalent to a conditional purpose, should one have certain desires and certain types of experience, to act in a certain general way.
This quote has been taken from Kenneth Laine Ketner's 1983 reconstruction of Peirce's 'Autobiography'
http://www.commens.org/dictionary/entry/quote-brief-intellectual-autobiography-charles-sanders-peirce-0