Jerome : To sin and lie against the Lord: and we turned away, so as not to go after the back of our Lord, to speak calumny, and we conceived transgression, and we spoke deceitful words from the heart. LXX: We have acted impiously, and we have lied, and we have turned away from our God. We have spoken wickedly and we have been disobedient. We have conceived and contemplated wicked words in our hearts. But what are these injustices? To sin and to lie against God: or as Aquila translated according to the Hebrew, to deny God: which refers to the Savior. And they say: We have abandoned our God, saying: We know that God spoke to Moses: but we do not know where this one comes from (John 9:29), so that we may speak false accusations, If this man were from God, he would not break the Sabbath (Ibid., 16). And he cast out devils from the prince of devils (Luke 11:15). And transgression, which is more significantly called apostasy in Greek, is when someone denies God and is accused of rebellion. We have conceived and spoken words of falsehood from the heart, despising the law of God and following the traditions of men, which they call second commandments, and which we have pretended in our heart. — Commentary on Isaiah