No religious system can be founded otherwise than upon the nature of God and of men, and upon the relations they bear to each other. But, in order to judge of the reality of these relations, we must have some idea of the Divine nature. But everybody tells us that the essence of God is incomprehensible to man; at the same time they do not hesitate to assign attributes to this incomprehensible God, and assure us that man can not dispense with a knowledge of this God so impossible to conceive of. The most important thing for men is that which is the most impossible for them to comprehend. If God is incomprehensible to man, it would seem rational never to think of Him at all; but religion concludes that man is criminal if he ceases for a moment to revere Him.