There are men who would be afraid to commit themselves on the doctrine that castor oil is a laxative.

The supernatural does not exist.

Lightning is like an elementary spirit, eccentric or rational, clever or silly, passing from one extreme to the other.

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?

It is in the name of Jesus, himself become God, that fanaticism ignominiously condemned to the stake men like Giodano Bruno, Vanini, Étienne Dolet, John Huss, Savanarola, and numerous other heroic victims; that the Inquisition ordered Galileo to belie his conscience; that thousands and thousands of unfortunates accused of witchcraft were burnt alive in popular ceremonies; it was with the express benediction of Pope Gregory XIII that the butchery of St. Bartholomew drenched Paris in blood.

That hemisphere of the moon which faces us is better known than the earth itself; its vast desert plains have been surveyed to within a few acres; its mountains and craters have been measured to within a few yards; while on the earth's surface there are 30,000,000 square kilometres (sixty times the extent of France), upon which the foot of man has never trod, which the eye of man has never seen.

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