This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
... to identify and evaluate the various aspects involved — which can be done only by unscrambling the mixed elements of “black” and “white.”
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The basic error in all these va
rious confusions is the same: it consists of forgetting that morality deals only with issues open to man’s choice — which means: forgetting the difference between “unable” and “unwilli
ng.” This permits people to translate the catch phrase “There are no blacks and whites” into: “Men are unable to be wholly good or wholly evil” — which they accept, in foggy resignat...