Just preach a god like this one.
Luthardt: “A change of attitude on the part of God is meant.” 2 Cor. 5:19 furnishes additional proof that by the objective reconciliation which Christ has effected a change of heart took place, not in men, but in God.
Francis Pieper, Christian Dogmatics, Volume II, p.346
Every good gift and every perfect gift is from above, coming down from the Father of lights, with whom is no variableness, neither shadow of turning. (James 1:17)
The true God is and always has been perfect. Any change in Him would therefore be for the worse. It is His constancy, His fidelity, His everlasting sameness, wherein lies our hope: “For I [am] the LORD, I change not; therefore you sons of Jacob are not consumed.” (Malachi 3:6)
His Mercy is from everlasting to everlasting. (Psalm 103:17)
Jesus Christ, the same yesterday, today, and for ever. (Hebrews 13:8)