This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...elf, brother!” And that , in effect, is what he is actually doing; consciously or subconsciously, intentionally or inadvertently, when a man declares: “There are no blacks and whites,” he
is making a psychological confession, and what he means is: “/ am unwilling to be wholly good — and please don’t regard me as wholly evil!”
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Just as, in epistemology, the cu
lt of uncertainty is a revolt against reason — so, in ethics, the cult of moral grayness is a revolt against moral values. Both are a revolt against the absolutism of reality.