Friedrich Nietsche

That which does not kill us makes us stronger.

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It is not a lack of love, but a lack of friendship that makes unhappy marriages.

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I'm not upset that you lied to me, I'm upset that from now on I can't believe you.

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It is hard enough to remember my opinions, without also remembering my reasons for them!
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And those who were seen dancing were thought to be insane by those who could not hear the music.
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You have your way. 

I have my way. 

As for the right way, the correct way, and the only way, it does not exist.
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In heaven, all the interesting people are missing.
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You must have chaos within you to give birth to a dancing star.
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Nietzsche began his career as a classical philologist before turning to philosophy. 
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In 1869, at the age of 24 he was appointed to the Chair of Classical Philology at the University of Basel making him the youngest individual to have held this position. 
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But he resigned in the summer of 1879 due to health problems that plagued him most of his life.
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Nietzsche's influence remains substantial within and beyond philosophy, notably in existentialism, nihilism and postmodernism. 
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His style and radical questioning of the value and objectivity of truth have resulted in much commentary and interpretation, mostly in the continental tradition.