The existence of a God is the basis of all Religion. Nevertheless, this important truth has not as yet been demonstrated, I do not say so as to convince unbelievers, but in a manner satisfactory to theologians themselves. Profound thinkers have at all times been occupied in inventing new proofs. What are the fruits of their meditations and arguments? They have left the subject in a worse condition; they have demonstrated nothing; they have almost always excited the clamours of their brethren, who have accused them of having poorly defended the best of causes.