This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...� is a desire experi- enced by a person who does not know and does not care to discover its cause.
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No philosopher has given a rational, objectively demonstrable, scientific answer
to the question of why man needs a code of values. So long as that question remained unanswered, no rational, scientific, objective code of ethics could be discovered or defined. The greatest of
all philosophers, Aristotle, did not regard ethics as an exact science; he based his ethical system on observations of what the noble and wise men of his time chose to do, leaving unanswered th...