You are foolish, but without fools there would be no wisdom
John Colton
John Colton (1886–1946). Stuart Walker. Priest, Werewolf of London, to Dr. Glendon and his friend, who are going into the Forbidden Valley against his advice (1935).
Original story by Robert Harris; Colton was born in Japan, of British parents, and then moved to America—you figure out his nationality.