Men have had the vanity to pretend that the whole creation was made for them, while in reality the whole creation does not suspect their existence.

Le Verrier-without leaving his study, without even looking at the sky-had found the unknown planet [Neptune] solely by mathematical calculation, and, as it were, touched it with the tip of his pen!

The present inhabitation of Mars be a race superior to ours is very probable.

May we attribute to the color of the herbage and plants, which no doubt clothe the plains of Mars, the characteristic hue of that planet, which is noticeable by the naked eye, and which led the ancients to personify it as a warrior?

Lightning seems a thought, which instead of being attached to a brain, is attached to an electric current.

The supernatural does not exist.

If the existence of human beings leads to nothing, what is all this comedy about?