This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...l, exceptions — moralists have regarded ethics as the province of whims, that is: of the irrational. Some of them did so explicitly, by intention — others implicitly, by default. A “whim� � is a desire experi- enced by a person who does not know and does not care to discover its cause.

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...
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