This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...thics — in the choice of his values, of his actions, of his pursuits, of his life’s goals — man must be guided by something other than reason. By what? Faith — instinct — intuition —
revelation — feeling — taste — urge — wish — whim. Today, as in the past, most philosophers agree that the ultimate standard of ethics is whim (they call it “arbitrary postulate”
or “subjective choice” or “emotional commitment”) — and the battle is only over the question or whose whim: one’s own or society’s or the dictator’s or God’s. Whatever else the...
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