The moment we begin to rest our peace on anything in ourselves we lose the enjoyment of it. And this is why so many Christians have not settled peace. Nothing can be lasting that is not built on God alone.
How can you have settled peace? Only by having it in God’s own way. By not resting on anything, even the Holy Spirit’s work within yourselves, but on what Christ has done for you and without you. Then you will know peace—conscious unworthiness, but yet peace.
In Christ alone God finds that in which He can rest and so it is with His people. The more you see the extent and nature of the evil that is within, as well as that without and around, the more you will find that what Jesus is and has done constitutes the only ground on which you can rest.