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“All things truly wicked start from innocence.”
― Ernest Hemingway

“Confidence is ignorance. If you're feeling cocky, it's because there's something you don't know.”
― Eoin Colfer, Artemis Fowl

“There is nothing more frightful than ignorance in action.”
― Johann Wolfgang von Goethe, Collected Works

“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”
― Daniel J. Boorstin