„I affirm, in words as true and literal as any that belong to geometry, that the man who withholds knowledge from a child not only works diabolical miracles for the destruction of good, but for the creation of evil also.“

— Horace Mann

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„The only good is knowledge, and the only evil is ignorance.“
— Herodotus
„There is only one good, knowledge, and one evil, ignorance.“
— Socrates
„God is the solitude of men. There was only me: I alone decided to commit Evil; alone, I invented Good. I am the one who cheated, I am the one who performed miracles, I am the one accusing myself today, I alone can absolve myself; me, the man.“
— Jean Paul Sartre
„There can be knowledge of the diabolical, but no belief in it, for more of the diabolical than there is does not exist.“
— Franz Kafka
„The unconscious is not just evil by nature, it is also the source of the highest good: not only dark but also light, not only bestial, semihuman, and demonic but superhuman, spiritual, and, in the classical sense of the word, "divine."“
— C.G. Jung