UNCHANGEABLE IN HIS BEING Here the Catechism affirms the unchangeable nature or character of God (referred to in the theological vocabulary as his immutability). This doctrine affirms that God, ontologically and decretally speaking, does not and cannot change. Such verses as the following provide the basis for this classic Christian conviction: Numbers 23:19: “God is not a man, that he should lie, nor a son of man, that he should change his mind [וְיִתְנֶחָם, weyiṯneḥām]. Does he speak and then