It would follow from this, that a man cannot perfectly comprehend an angel, nor even another man vastly superior to himself. The saint then, on some points of his character, is not amenable to the judgement of the ordinary man of common sense; nor the philosopher, or theologian, or man of science, to the unrevised verdict of the plain man; nor the statesman, or hero, to the man in the street.

Of God and His Creatures: 1.102