After you forgive someone, don't go back to unforgiveness. What's the point of that?
If you want to avoid being consumed alive by the serpent, you must do what God tells you, no matter whether you understand it or not. If you want understanding, seek it, and read the scripture. See Psalm 91:1-End "He who dwells in the shelter of the Most High God, will abide in the shadow of the Almighty."