This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...knowledge that the good is the good. To him, a person of virtue is a threat that can topple all of his evasions — particularly when an issue of justice is involved, which demands that he take
sides. It is then that such formulas as “Nobody is ever fully right or fully wrong” and “Who am I to judge?” take their lethal effect. The man who begins by saying: “There is some good
in the worst of us,” goes on to say: “There is some bad in the best of us” — then: “There’s got to be some bad in the best of us” — and then: “It’s the best of us who make l...
read full book