Man has a single basic ...

Man has a single basic choice: to think or not, and that is the gauge of his virtue. Moral perfection is an unbreached rationality-not the degree of your intelligence, but the full and relentless use of your mind, not the extent of your knowledge, but the acceptance of reason as an absolute.
Man has a single basic choice: to think or not, and that is the gauge of his virtue. Moral perfection is an unbreached rationality-not the degree of your intelligence, but the full and relentless use of your mind, not the extent of your knowledge, but the acceptance of reason as an absolute.
 Ayn Rand

Quotes from the same author

A creative man is motivated by the desire to achieve, not by the desire to beat others.
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 Ayn Rand
The truth is not for all men, but only for those who seek it.
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 Ayn Rand
The action required to sustain human life is primarily intellectual; everything man needs has to be discovered by his mind and produced by his effort.
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 Ayn Rand
If you want to know the one reason that's taking me back, I'll tell you: I cannot bring myself to abandon to destruction all the greatness of the world, all that which was mine and yours, which was made by us and is still ours by right - because I cannot believe that men refuse to see, that they can remain blind and deaf to us forever, when the truth is ours and their lives depend on accepting it.
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 Ayn Rand
Run for your life from any man who tells you that money is evil. That sentence is the leper's bell of an approaching looter. So long as men live together on earth and need means to deal with one another--their only substitute, if they abandon money, is the muzzle of a gun.
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 Ayn Rand