This knowledge of peace with God will appear to others as a spiritual calm in the midst of calamity. While our lives may be turned upside down outwardly, yet in this inner, spiritual peace with God, we receive whatever his hand gives us in life with contentment, patience, and trust. We trust God, who looks upon us in his attitude of favor and who is at peace with us, does all things well. ….
For the believer there is a refuge of rest and peace in the midst of this tumultuous life. There is a place in this life that is unconquerable from the violent waves of ungodliness that the world pours out in order to destroy the church. There is a place for the Christian soldier to go in the heat of the spiritual battles of this life against the violence of sin and ungodliness. There is a place near at hand, to which we may run in time of trouble and find restful refreshment for our souls. ….
That place of blissful refuge and unconquerable protection is under the shadow of the wings of the Almighty. In that place there is neither terror nor fear, but only that satisfying peace with God (Ps. 91:1-5). Let us enter that place in prayer and in worship to our heavenly Father faithfully and daily.
(Richard J. Smit: “The Fruit of the Spirit of Jesus Christ” pp.57, 58, 59)