From the Quotation of the day mailing list 2014-10-29:
"Positive thinking fools our minds into perceiving that we've already attained our goal, slackening our readiness to pursue it." -- Gabriele Oettingen, professor of psychology and author of "Rethinking Positive Thinking: Inside the New Science of Motivation."
(submitted to the mailing list by Mike Krawchuk)