For the last two weeks the images coming out of Afghanistan have been awful. Whatever your political persuasion, the sight of a mother handing her child to US soldiers over a wall for the sake of that child’s safety is heartbreaking. The death of 13 US soldiers and dozens of Afghans as the result of a suicide bomber was devastating. Any peace that may have existed in that country on account of the presence of the US and its allies has evaporated. The people of Afghanistan and those who have yet been unable to get out safely need to be in our prayers.

Peace is precious but elusive in our world. Nations can be torn from within and without. This is one of the reasons we pray, as Jesus taught us, Thy kingdom come, Thy will be done on earth as it is in heaven. Or as it says in Revelation 22:20: Come, Lord Jesus. Because to whatever extent God’s kingdom and will are becoming a present reality, ultimately they point us to the day Christ will return “to judge the living and the dead.” Only when Jesus comes again will the kingdom of God arrive in its glorious, peace-filled fullness. Only Jesus the Prince of Peace can secure lasting peace.

Living in the meantime always means living in the tension between “the now and the not yet.” We live in between the times, between the first and second coming of our Lord Jesus. While we look forward with hope to a future that will be conflict and violence free, human history will continue to be riddled with gunfire and soaked in blood. There is a Cain for every Abel. No amount of diplomacy, uneasy ceasefires, and political maneuvering will change this.

We need God himself to usher in his peace.

When I was growing up as a Roman Catholic, each Mass included the passing of the peace. We would turn to those around us and say, “The peace of Christ be with you.” The other person would respond by saying “And also with you.” In most Protestant churches we have turned this into a time of shaking hands and greeting one another. But they are not the same thing. To pass the peace is to declare and share the source of genuine peace. Peace comes from outside of us. The passing of the peace is a prayer and a perspective.

In the Bible, Jerusalem is the city of God. It is both historical and symbolic. Psalm 122:6–9 says this: Pray for the well-being of Jerusalem: “May those who love you be secure; may there be peace within your walls, security within your fortresses.” Because of my brothers and friends, I will say, “May peace be in you.” Because of the house of the Lord our God, I will pursue your prosperity.

One of the interesting shifts we see from the Old Testament to the New Testament is that all of the language of sacred buildings–say, the Temple or house of the Lord–gets transposed and refers to the actual people of God. For example, in 1 Peter 2:5, the community of faith is being built into a spiritual house. So perhaps we can think of Psalm 122:6–9 in a similar way. If so, then the prayer of the psalmist is that God’s people would be filled to overflowing with peace. Those who gather together as the church are to become outposts of peace in a conflict-filled world. When in the midst of a fellowship of believers, those whose lives have been rent asunder by violence and hate ought to find security. May peace be in you.

On the eve before his crucifixion, Jesus said to his disciples: Peace I leave with you. My peace I give to you. I do not give to you as the world gives. Don’t let your heart be troubled or fearful. The peace Jesus gives to us now isn’t the empty promise or futile effort of a cynical politician. Nor does it involve the present elimination of all strife, whether between individuals or nations. Instead, it is the peace we can have in knowing that one day his kingdom will come and that the hostility of our world will come to an end. It is the peace the prophet Isaiah spoke about so beautifully. Speaking of the nations, the prophet says:

They will beat their swords into plows
and their spears into pruning knives.
Nation will not take up the sword against nation,
and they will never again train for war.

Isaiah 2:4

Such a vision almost seems impossible to believe or too good to be true. And were we to count on ourselves to bring about such a reality, we’d be right to think of such a state of affairs as beyond our grasp. Thankfully, however, not only is God able to accomplish this, he will indeed do so. That is his promise. That is the trajectory of biblical revelation. In the meantime, we can have peace now by trusting in the one who will eventually–in his timing and power–usher in the fullness of peace we so desperately want our world to know.