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!

What, then, is this blue sky, which certainly does exist, and which veils from us the stars during the day?

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

What intelligent being, what being capable of responding emotionally to a beautiful sight, can look at the jagged, silvery lunar crescent trembling in the azure sky, even through the weakest of telescopes, and not be struck by it in an intensely pleasurable way, not feel cut off from everyday life here on Earth and transported toward that first step on celestial journeys?

The universe is so immense that it appears immutable, and that the duration of a planet such as that of the earth is only a chapter, less than that, a phrase, less still, only a word of the universe’s history.

The supernatural does not exist.

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