Sin is a personal act. Moreover, we have a responsibility for the sins committed by others when we cooperate with them: by participating directly and voluntarily in them; by ordering, advising, praising, or approving them; by not disclosing or not hindering them when we have an obligation to do so; and by protecting evil-doers. ( CCC 1868)
”Enter the inner chamber of your soul, shut out everything except God and that which can help you in seeking him, and when you have shut the door, seek him.” – St. Anselm of Canterbury