The term ‘immutability’ refers to God’s ‘unchangeable-ness’. Psalm 55:19 tells us that God ‘does not change’ (see also Malachi 3:6, James 1:17). He is absolutely consistent, and is therefore absolutely reliable and trustworthy even though every created thing does change. This unchanging nature is reflected in the personal name of God - YHWH. (Nowadays this is often given vowels as Yahweh, but in older Bible versions is written as Jehovah. In most contemporary Bibles it is represented by ‘the LORD’ in capital letters.) YHWH means ‘I Am who I Am’ (Exodus 3:14). We also see God’s immutability in Revelation 4:8, where the angels declare their praises of God saying: ‘Holy, holy, holy is the Lord God Almighty, who was, and is, and is to come.’ The New Testament speaks of Jesus Christ in the same way, saying that He is ‘the same yesterday, today and forever’ (Hebrews 13:8).
