“There is an easily observable contrast in many men between their secular knowledge and their religious instruction; the former is that of a grown man, who has studied for a long time, who has specialized in some professional skill, who knows life, who is cultivated; the second has remained that of a child, wholly elementary, rudimentary, a mixture of childish imagination, poorly assimilated abstract notions, scraps of vague and disconnected teachings gathered by chance from existence. The disproportion is such that it often ends in an abandonment of faith.”