God the Father could change His will, God the Son could sin, and God the Holy Spirit could inspire evil. It is possible for God to be tricky, because if God cannot do what He has decreed to be evil, then He would not be as free as volitional creatures, and there would be no basis for praising His holiness.
Paul (in RM 9:16-21) upholds the freedom of God to love or hate as He chooses. Just as God created physical laws such as gravity, so He created moral laws such as “love everyone” and determined a plan of salvation involving the atoning death of Messiah to win our redemption from hell. Thou shalt love (MT 22:37-40).
The cliche “might makes right” is true; it is because God is almighty that only He can determine what is right ultimately. There is no super-divine authority that determines God; God is self-determined. The only basis humans have for evaluating whether God is just or righteous is understanding how God’s acts and judgments are consistent with the moral principles He has ordained for those created in His image (RM 3:22-26).
If God were ever to change His mind, it would mean that God is tricky and that morality is ultimately arbitrary. Thus, ultimate reality would indeed be a farce. This is why we should not take God and divine love for granted. Instead, we should be eternally grateful that God has decreed loving to be right, and He promises never to change (ML 3:6). Let us praise God in the spirit of Psalm 66:1: “Shout with joy to God, all the earth! Sing to the glory of his name; Offer him glory and praise!”
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