Nature, you say, is totally inexplicable without a God; that is to say, in order to explain what you understand so little, you need a cause which you do not understand at all. You pretend to make clear that which is obscure, by magnifying its obscurity. You think you have untied a knot by multiplying knots. Enthusiastic philosophers, in order to prove to us the existence of a God, you copy complete treatises on botany; you enter into minute details of the parts of the human body; you ascend into the air to contemplate the revolutions of the stars; you return then to earth to admire the course of the waters; you fly into ecstasies over butterflies, insects, polyps, organized atoms, in which you think to find the greatness of your God; all these things will not prove the existence of this God; they will only prove that you have not the ideas which you should have of the immense variety of causes and effects that can produce the infinitely diversified combinations, of which the universe is the assemblage. This will prove that you ignore nature, that you have no idea of her resources when you judge her incapable of producing a multitude of forms and beings, of which your eyes, even by the aid of the microscope, see but the least part; finally, this will prove, that not being able to know the sensible and comprehensible agents, you find it easier to have recourse to a word, by which you designate an agent, of whom it will always be impossible for you to form any true idea.