This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...udgments is to be achieved by reference to the facts of reality. The fact that a living entity is, determines what it ought to do. So much for the issue of the relation between “/.s'” a
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Now in what manner does a human being discover the concept of “ value ”? By what means does he first become aware of the issue of “good or evil” in its simp
lest form? By means of the physical sensations of pleasure or pain. Just as sensations are the first step of the development of a human consciousness in the realm of cognition , so they are its ...