The end of a war certainly feels differently than fighting a war, but if we seek the feeling of peace without resolving conflict, then all we desire is a kind of heavenly tranquilizer. If you are a Christian, I presume the war is over between you and God. Conflict we still have, praise God. It is the evidence that we, like Paul, confess that the Law is good. The evidence that we belong to God is not perfect behavior but increased distress over how short we fall from being as wonderfully loving as Jesus is.
Love is part of the problem.
If we love God it produces obedience, while effort to do better is doomed to failure. I would add that what God wants is not our behavior, He wants us. Let me press on with a bit more scripture so you can see the problem more clearly. This is not an easy thing to understand and will require re -reading the book of Romans and that little two page Prophet in the OT named Haggai. You will find the comments in Hebrews about resting in God interesting too.