This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...ess can neither seek nor evade. An organism that possesses only the faculty of sensation is guided by the pleasure -pain mechanism of its body, that is: by an automatic knowledge and an automati
c code of values. Its life is the standard of value directing its actions. Within the range of action possible to it, it acts automatically to further its life and cannot act for its own destruc
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The higher organisms possess a much more potent form of consciousness: they possess the faculty of retaining sensations, which is the faculty of perception. A “perception�...