This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...y cases, to atone for the consequences of his past — but he is not free to escape them, nor to live his life with impunity on the range of the moment, like an animal, a playboy or a thug. If h e is to succeed at the task of survival, if his actions are not to be aimed at his own destruction, man has to choose his course, his goals, his values in the context and terms of a lifetime. No sensations, percepts, urges or “instincts” can do it; only a mind can.

Such is the meaning of the definition: that which is required for man’s survival qua man. It does not ...
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