“The evil in the world is the product of the non-divine minds themselves: the natural evil, of their very nature; the moral, the only real evil, of their failure to answer to their reason with their will.”

Capitalism: The Unknown Ideal (1966)

Le mal se fait sans effort, naturellement, par fatalité; le bien est toujours le produit d'un art.
XI: "Éloge du maquillage" http://fr.wikisource.org/wiki/%C3%89loge_du_maquillage
Le peintre de la vie moderne (1863)

Phaedo 115e
literally: 'For know well', he said, 'o dearest Kriton, that to not speak well is not only sinful by itself, but lets evil intrude into the soul.'(εὖ γὰρ ἴσθι, ἦ δ᾽ ὅς, ὦ ἄριστε Κρίτων, τὸ μὴ καλῶς λέγειν οὐ μόνον εἰς αὐτὸ τοῦτο πλημμελές, ἀλλὰ καὶ κακόν τι ἐμποιεῖ ταῖς ψυχαῖς.)
Plato, Phaedo

As quoted in Voices: A Memoir (1983) by Frederic Prokosch

Il est à peu près impossible de constituer systématiquement une morale naturelle. La nature n'a pas de principes. Elle ne nous fournit aucune raison de croire que la vie humaine est respectable. La nature, indifférente, ne fait nulle distinction du bien et du mal.
La Révolte des Anges [The Revolt of the Angels] (1914), ch. XXVII

XI, 9
The City of God (early 400s)
Context: For when God said, “Let there be light, and there was light,” if we are justified in understanding in this light the creation of the angels, then certainly they were created partakers of the eternal light which is the unchangeable Wisdom of God, by which all things were made, and whom we call the only-begotten Son of God; so that they, being illumined by the Light that created them, might themselves become light and be called “Day,” in participation of that unchangeable Light and Day which is the Word of God, by whom both themselves and all else were made. “The true Light, which lighteth every man that cometh into the world,” — this Light lighteth also every pure angel, that he may be light not in himself, but in God; from whom if an angel turn away, he becomes impure, as are all those who are called unclean spirits, and are no longer light in the Lord, but darkness in themselves, being deprived of the participation of Light eternal. For evil has no positive nature; but the loss of good has received the name “evil.”

Source: Guide for the Perplexed (c. 1190), Part III, Ch.10

1960s
Source: As quoted in The Myth of American Diplomacy: National Identity and U.S. Foreign Policy https://books.google.it/books?id=DNId6HxkzQwC&pg=PA247&dq=%22The+evils+of+capitalism+are+as+real+as+the+evils+of+militarism+and+evils+of+racism%22 (1968)

Pearls of Wisdom