Blind belief in authority is the greatest enemy of truth.

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Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

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Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

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I don't need to know everything, I just need to know where to find it, when I need it

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Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly.

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Thinking is hard work; that's why so few do it.

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If you can't explain it simply, you don't understand it well enough.

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Persistence is the most powerful force on earth, it can move mountains.

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Knowledge is realizing that the street is one way; wisdom is looking in both directions anyway.

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Imagination is more important than knowledge. Imagination is the language of the soul. Pay attention to your imagination and you will discover all you need to be fulfilled.

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