1867 The catechetical tradition also recalls that there are “sins that cry to heaven”: the blood of Abel,139 the sin of the Sodomites,140 the cry of the people oppressed in Egypt,141 the cry of the foreigner, the widow, and the orphan,142 injustice to the wage earner.143 (2268) 1868 Sin is a personal act. Moreover, we have a responsibility for the sins committed by others when we cooperate in them: (1736) — by participating directly and voluntarily in them; — by ordering, advising, praising, or approving