How do we know God's immutability is true?

The belief in God's immutability comes from His character as described in Scripture. Romans 11:29 states that 'the gifts and calling of God are without repentance,' indicating that God's purposes and decisions do not change. This unchanging nature assures believers that His promises and character remain constant throughout time. Hebrews 6:17-18 further validates this, noting that God confirmed His immutable counsel with an oath, providing strong consolation for those who seek refuge in Him.