God will make “judgments” (8201). Yes, we are under grace. That is the good news. The bad news is that there are still expectations and God has not gone to sleep. He is still watching our behavior. Time and time again in scripture it talks about our actions having rewards and punishments.
How does that work out in regard to grace? There are many disagreements there. All agree that we are saved by the grace of God and that faith is required. Many, if not most, would agree that somehow obedience is important or necessary. Since I don’t want to write a book here, just accept that God did not send Jesus to the cross and then go to sleep with a job well done.
He is still on the throne. He will not be mocked. Remember the scary words of Jesus,
(Matthew 7:21 KJV) Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.So? Trust, yes. Obey, yes. Why make it an issue? As the commercial says, “Just do it.” We can argue about the importance of each later.