Truly, that reason upon which we plume ourselves, though it may answer for little things, yet for great decisions is hardly surer than a toss-up.
Source: In 2,715 One-Line Quotations for Speakers, Writers & Raconteurs, by Edward F. Murphy, 1981.
-- Charles Sanders Peirce, (Sep 10 1839-1914), US philosopher, scientist, logician; He was noted for his work on the logic of relations and on pragmatism as a method of research.