and the peace of God, which surpasses every understanding, shall guard your hearts and your thoughts by Christ Jesus.
This promise comes with a condition: it follows Paul's call to be anxious about nothing and to bring everything to God in prayer. The verse does not promise that God grants the request — it promises that "the peace of God" will stand guard over the believer.
Peace with God and the peace of God
Commentators separate this verse from another well-known promise about peace. One describes where we stand with God. The other describes what fills the heart.
"The peace of God" must be distinguished from "peace with God," which we read about in Romans 5:1. That is peace in our relationship with God. It comes from knowing He has declared us righteous. This peace is like God's own peace in character. It fills our hearts when we have committed everything to Him in prayer and trust His love and wisdom on our behalf. Then we have no anxious care about anything.
Whose peace it is
The phrase is not describing a peaceful feeling we manufacture. It names the calm that belongs to God Himself, unshaken by anything that has gone wrong in His universe.
The peace of God is that which fills God's own heart above, which nothing disturbs. The heavens have been corrupted and the earth ruined. Israel has failed, and the Church too. Yet nothing disturbs the peace of the Divine heart. His purposes stand, despite all the failure of His creatures; there God rests and there we rest also.
The peace keeps you
Look at who does the keeping here. Peace is not something we must protect. It is the protector.
It does not say you shall keep the peace of God. It says "the peace of God shall keep your hearts and minds." That is the peace God Himself lives in. What peace must that be! Can any circumstances shake God's throne? God is not troubled about circumstances. Lay the whole burden on Him. Then "the peace of God shall keep your hearts and minds," and it will flow into your hearts like a river, surpassing all understanding.
What is promised, and what is not
Notice what verse 7 does not say. It does not say the thing you asked for will be given. What it guarantees is the guarding.
There is no guarantee, you notice, that all our requests will be granted. That would never do. Our understanding is very limited, so we often ask for what would bring no glory to our Lord and no blessing to us. The guarantee is this: the peace of God, which surpasses all understanding, will guard our hearts and minds. Again and again Christians pass through trials they had begged to escape. Afterwards they look back and say, "I am a wonder to myself. I cannot understand how I came through so heavy a trial and was still lifted above it into such calm."
A garrison, not a mood
One writer pictures a besieged town. Its defence is so strong that the people inside stop being afraid.
"Shall keep your hearts and minds." A better translation is "Shall guard your hearts and thoughts." Picture yourself under siege in a walled city, surrounded by a powerful and vengeful enemy. But the garrison on the wall is so alert and so capable that you rest as if there were no enemy at all. That would surpass all understanding.
The same guard works in two directions. It meets the enemy outside and the thoughts that rise inside. But a sentry cannot defend a gate we insist on opening ourselves.
This "Sentinel" will guard from enemies within and without. It will guard me from the evil thoughts that rise up inside, hated and unwanted… But I must not think this: if I choose to open the gates to the enemy, if I choose to turn from my Bible to television or the like, I cannot expect my Heavenly Guard to fight for me then.
Where the passage is heading
Writers trace a movement across three phrases about peace. Each one goes further than the last.
There is a wonderful progression. It starts with having "peace with God" (Rom. 5:1), a peace that settles our standing before Him. It moves on to enjoying the "peace of God" (Phil. 4:7) when we hand our concerns and prayers over to Him. From there it reaches the experience that the "God of peace" is with us.
Summary
- Peace with God — our standing before Him settled once and for all. That is the starting line, not this verse.
- The peace of God — the calm God Himself lives in, which nothing in a ruined world disturbs; His rest becomes our rest.
- The transfer — it flows to us when we lay the whole burden on Him; we do not keep this peace, it keeps us.
- The guarantee — not that God grants the request, but that He garrisons heart and thoughts. Believers come through trials they begged to avoid, unable to explain their own calm.
- The destination — from peace with God, to the peace of God, to the God of peace Himself with us.