How can mental health stay balanced during adverse circumstances?

Les explains that the believer first makes peace with God at salvation, because reconciliation through the work of the cross removes enmity and makes the sinner God's child. Then, as one walks the Christian life, there can be outpourings of the peace of God; it never leaves, but may be experienced more at some times than others. As we pray and leave everything in the throne room of heaven, we can come away every day knowing the peace of God which passeth all understanding. It is beyond human concept, understood only by the believer, and it keeps our hearts and minds—our whole mental health—in balance even through adverse circumstances, with the assurance God has given of His peace.