God cannot change for the better, for He is already perfect; and being perfect, He cannot change for the worse. - AW Pink

God cannot change for the better, for He is already perfect; and being perfect, He cannot change for the worse.  Altogether unaffected by anything outside Himself, improvement or deterioration is impossible.  He is perpetually the same

- A.W. Pink 

The Immutability of God 

A.W. Pink's Studies in the Scriptures - 1930-31, Volume 5 of 17 p.145