4 “Upon my back have sinners built; they have done their iniquity afar off”. Why have they fought against me? Because “they could not prevail upon me.” What is this? They could not build upon me. I consented not with them unto sin. For every wicked man persecutes the good on this account, because the good man consents not with him to evil. Suppose he do some evil, and the Bishop censure him not, the Bishop is a good man: suppose the Bishop censure him, the Bishop is a bad man. Suppose he carry off anything, let the man robbed be silent, he is a good man: let him only speak and rebuke, even though he does not reclaim his goods, he is everything bad. He is bad then who blames the robber, and he is good who robs!...Heed not that such an one speaks to you: it is a wicked man through whom It speaks to you; but the word of God, that speaks to you, is not wicked. Accuse God: accuse Him, if you can.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)