The person who fights monsters should make sure that in the process, he does not become a monster himself. Because when you stare down at an abyss, the abyss stares back at you.
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About Friedrich Nietzsche
Friedrich Nietzsche was a 19th-century German philosopher. Friedrich Wilhelm Nietzsche was a German philosopher who started his career as a classical philologist and turned to philosophy early in his academic career. In 1869, aged 24, he was appointed Professor of Classical Philology at the University of Basel. Read more on Wikipedia →