The answer from God’s word:
“Each time God arrives on earth, He shall change His name, His gender, His image, and His work; He does not repeat His work, and He is always new and never old. When He came before, He was called Jesus; could He still be called Jesus when He comes again this time? When He came before, He was male; could He be male again this time? His work when He came during the Age of Grace was to be nailed to the cross; when He comes again will He still redeem mankind from sin? Will He still be nailed to a cross? Would that not be a repetition of His work? Did you not know that God is always new and never old?
There are those who say that God is immutable. That is correct, but it refers to the immutability of God’s disposition and substance. Changes in His name and work do not prove that His substance has altered; in other words, God will always be God, and this will never change. If you say that the work of God always stays the same, then would He be able to finish His six-thousand-year management plan? You merely know that God is forever unchanging, but do you know that God is always new and never old? If the work of God never changed, then could He have brought mankind to today? If God is immutable, then why is it that He has already done the work of two ages? His work is always progressing forward, and so His disposition is gradually revealed to man, and what is revealed is His inherent disposition.