It 'shall keep your hearts and minds.' The Apostle here blends together, in a very remarkable manner, the conceptions of peace and of war, for he employs a purely military word to express the office of this Divine peace. That word, 'shall keep,' is the same as is translated in another of his letters kept with a garrison—and, though, perhaps, it might be going too far to insist that the military idea is prominent in his mind, it will certainly not be unsafe to recognise its presence.
So, then, this Divine peace takes upon itself warlike functions, and garrisons the heart and mind. What does he mean by 'the heart and mind'? Not, as the English reader might suppose, two different faculties, the emotional and the intellectual—which is what we usually roughly mean by our distinction between heart and mind—but, as is always the case in the Bible, the 'heart' means the whole inner man, whether considered as thinking, willing, purposing, or doing any other inward act; and the word rendered 'mind' does not mean another part of human nature, but the whole products of the operations of the heart. The Revised Version renders it by 'thoughts,' and that is correct if it be given a wide enough application, so as to include emotions, affections, purposes, as well as 'thoughts' in the narrower sense. The whole inner man, in all the extent of its manifold operations, that indwelling peace of God will garrison and guard.
So note, however profound and real that Divine peace is, it is to be enjoyed in the midst of warfare. Quiet is not quiescence. God's peace is not torpor. The man that has it has still to wage continual conflict, and day by day to brace himself anew for the fight. The highest energy of action is the result of the deepest calm of heart; just as the motion of this solid, and, as we feel it to be, immovable world, is far more rapid through the abysses of space, and on its own axis, than any of the motions of the things on its surface. So the quiet heart, 'which moveth altogether if it move at all,' rests whilst it moves, and moves the more swiftly because of its unbroken repose. That peace of God, which is peace militant, is unbroken amidst all conflicts. The wise old Greeks chose for the protectress of Athens the goddess of Wisdom, and whilst they consecrated to her the olive branch, which is the symbol of peace, they set her image on the Parthenon, helmed and spear-bearing, to defend the peace, which she brought to earth. So this heavenly Virgin, whom the Apostle personifies here, is the 'winged sentry, all skilful in the wars,' who enters into our hearts and fights for us to keep us in unbroken peace.
It is possible day by day to go out to toil and care and anxiety and change and suffering and conflict, and yet to bear within our hearts the unalterable rest of God. Deep in the bosom of the ocean, beneath the region where winds howl and billows break, there is calm, but the calm is not stagnation. Each drop from these fathomless abysses may be raised to the surface by the power of the sunbeams, expanded there by their heat, and sent on some beneficent message across the world. So, deep in our hearts, beneath the storm, beneath the raving winds and the curling waves, there may be a central repose, as unlike stagnation as it is unlike tumult; and the peace of God may, as a warrior, keep our hearts and minds in Christ Jesus.
What is the plain English of that metaphor? Just this, that a man who has that peace as his conscious possession is lifted above the temptations that otherwise would drag him away. The full cup, filled with precious wine, has no room in it for the poison that otherwise might be poured in. As Jesus Christ has taught us, there is such a thing as cleansing a heart in some measure, and yet because it is 'empty,' though it is 'swept and garnished,' the demons come back again. The best way to be made strong to resist temptation, is to be lifted above feeling it to be a temptation, by reason of the sweetness of the peace possessed. Oh! if our hearts were filled, as they might be filled, with that divine repose, do you think that the vulgar, coarse-tasting baits which make our mouths water now would have any power over us? Will a man who bears in his hands jewels of priceless value, and knows them to be such, find much temptation when some imitation stone, made of coloured glass and a tinfoil backing, is presented to him? Will the world draw us away if we are rooted and grounded in the peace of God? Geologists tell us that climates are changed and creatures are killed by the slow variation of level in the earth. If you and I can only heave our lives up high enough, the foul things that live down below will find the air too pure and keen for them, and will die and disappear; and all the vermin that stung and nestled down in the flats will be gone when we get up to the heights. The peace of God will keep our hearts and thoughts.
III. Now, lastly, notice how we get the peace of God.
My text is an exuberant promise, but it is knit on to something before, by that 'and' at the beginning of the verse. It is a promise, as all God's promises are, on conditions. And here are the conditions. 'Be careful for nothing; but in everything by prayer and supplication, with thanksgiving, let your requests be made known unto God.' That defines the conditions in part; and the last words of the text itself complete the definition. 'In Christ Jesus' describes, not so much where we are to be kept, as a condition under which we shall be kept. How, then, can I get this peace into my turbulent, changeful life?
I answer, first, trust is peace. It is always so; even when it is misplaced we are at rest. The condition of repose for the human heart is that we shall be 'in Christ,' who has said, 'In the world ye shall have tribulation, but in Me ye shall have peace.' And how may I be 'in Him'? Simply by trusting myself to Him. That brings peace with God.
The sinless Son of God has died on the Cross, a sacrifice for the sins of the whole world, for yours and for mine. Let us trust to that, and we shall have peace with God, through our Lord Jesus Christ. And 'in Him' we have, by trust, inward peace, for He, through our faith, controls our whole natures, and Faith leads the lion in a silken leash, like Spenser's Una. Trust in Christ brings peace amid outward sorrows and conflicts. When the pilot comes on board the captain does not leave the bridge, but stands by the pilot's side. His responsibility is past, but his duties are not over. And when Christ comes into my heart, my effort, my judgment, are not made unnecessary, or put on one side. Let Him take the command, and stand beside Him, and carry out His orders, and you will find rest to your souls.
Again, submission is peace. What makes our troubles is not outward circumstances, howsoever afflictive they may be, but the resistance of our spirits to the circumstances. And where a man's will bends and says, 'Not mine but Thine be done,' there is calm. Submission is like the lotion that is applied to mosquito bites—it takes away the irritation, though the puncture be left. Submission is peace, both as resignation and as obedience.