This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...o the actions of a con- sciousness) and is not to imply the existence of any teleological principle operating in insentient nature. I use the term “goal-directed,” in this context, to design
ate the fact that the automatic functions of living organisms are actions whose nature is such that they result in the preservation of an organism’s life.
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Metaphysically, life is
the only phenomenon that is an end in itself: a value gained and kept by a constant process of action. Epistemologically, the concept of “value” is genetically dependent upon and derived fr...