In fact, as soon as you have imagined that everything has emanated from the supreme and intelligent Being, that nothing has emanated from the Being without reason, that this Being existing always, must always have acted, that consequently all things must have eternally issued from the womb of His existence, you should no more refuse to believe in the matter of which this pebble and this fly, an eternal production, are formed, than you refuse to imagine light as an eternal emanation from the omnipotent Being.

Since I am a being with extension and thought, my extension and my thought are therefore necessary productions of this Being. It is evident to me that I cannot give myself either extension or thought. I have therefore received both from this necessary Being.

Can He give me what He has not? I have intelligence and I am in space; therefore He is intelligent, and He is in space.

To say that this eternal Being, this omnipotent God, has from all time necessarily filled the universe with His productions, is not to deprive Him of His liberty; on the contrary, for liberty is only the power of acting. God has always acted to the full; therefore God has always made use of the fullness of His liberty.

The liberty that is called liberty of indifference is a phrase without idea, an absurdity; for it would be determination without reason; it would be an effect without a cause. Therefore, God cannot have this so-called liberty which is a contradiction in terms. He has therefore always acted through this same necessity which makes His existence.

It is therefore impossible for the world to be without God, it is impossible for God to be without the world.

This world is filled with beings who succeed each other, therefore God has always produced beings who succeed each other.

These preliminary assertions are the basis of the ancient Oriental philosophy and of that of the Greeks. One must except Democritus and Epicurus, whose corpuscular philosophy combated these dogmas. But let us remark that the Epicureans relied on an entirely erroneous natural philosophy, and that the metaphysical system of all the other philosophers holds good with all the systems of natural philosophy. The whole of nature, excepting the vacuum, contradicts Epicurus; and no phenomenon contradicts the philosophy which I have just explained. Well, is not a philosophy which is in accord with all that passes in nature, and which contents the most careful minds, superior to all other non-revealed systems?