„Getting some redecorating ideas?’ Nico asked. ‘Maybe you could do your dining room in mediaeval monk skulls.’Hades arched an eyebrow. ‘I can never tell when you’re joking.“

— Rick Riordan

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„You could attach prices to ideas. Some cost a lot some little. … And how do you pay for ideas? I believe: with courage.“
— Ludwig Wittgenstein
„Read absolutely everything you get your hands on because you'll never know where you'll get an idea from…“
— Malcolm X
„If you are a man of learning, fight in the skull, kill ideas and create new ones.“
— Nikos Kazantzakis