There is no supernatural, there is only nature. Nature alone exists and contains all. All is. There is the part of nature that we perceive, and the part of nature that we do not perceive. ... If you abandon these facts, beware; charlatans will light upon them, also the imbecile. There is no mean: science, or ignorance. If science does not want these facts, ignorance will take them up. You have refused to enlarge human intelligence, you augment human stupidity. When Laplace withdraws Cagliostro appears.

The eye of a man should be still more reverent before the rising of a young maiden than before the rising of a star. The possibility of touch should increase respect. The down of the peach, the dust of the plum, the radiated crystal of snow, the butterfly’s wing powdered with feathers, are gross things beside that chastity that does not even know it is chaste. The young maiden is only the glimmer of a dream and is not yet statue. Her alcove is hidden in the shadows of the ideal. The indiscreet touch of the eye desecrates this dim penumbra. Here, to gaze, is to profane.

A breath of Paris preserves the soul.

To die for lack of love is horrible. The asphyxia of the soul.

Ideas can no more flow backward than can a river.

Human society, the world, and the whole of mankind is to be found in the alphabet.

O darkness, the sky is a gloomy precinct Whose door you close, and whose key the soul owns; And night divides itself in half, being diabolical and holy, Between Ilis, the black angel, and Christ, the starry Human Being.