He quickly lowered his eyes to his knees again, to conceal the pain in them, to conceal his broken faith in the innate goodness of men, the profound despair of realization that reason might not after all triumph over ignorance.
Perhaps, he murmured aloud, To believe in the inevitable triumph of rationality might, in itself, be no more than another expression of those same superstitions which we deplore in the ignorant. It is apparently an occupational disease, perhaps a fatal one, for the scientist to be too sanguine about eventual rule by reason. There is so little evidence...

p. 16 - They'd Rather Be Right (1954)