This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...ich may or may not last a week or a year. “Man’s survival qua man” means the terms, methods, conditions and goals required for the survival of a rational being through the whole of his lif
espan — in all those aspects of existence which are open to his choice.
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Man cannot survive as anything but man. He can abandon his means of survival, his mind, he can turn himsel
f into a subhuman creature and he can turn his life into a brief span of agony — just as his body can exist for a while in the process of disintegration by disease. But he cannot succeed, as a...