I. What We're Not Promised: Exterior Peace
From the context, we can see the kind of peace that Christ isn't promising (Luke 12:49-53):
So He won't provide us with exterior peace. By exterior peace, I mean the ability of everyone to simply get along without arguing. In fact, He's upfront about the fact that Christianity will lead to division. Non-Christians are often scandalized by what we believe and do, just as we're often scandalized by what they believe and do.“I have come to set the earth on fire, and how I wish it were already blazing! There is a baptism with which I must be baptized, and how great is my anguish until it is accomplished!
Do you think that I have come to establish peace on the earth? No, I tell you, but rather division. From now on a household of five will be divided, three against two and two against three; a father will be divided against his son and a son against his father, a mother against her daughter and a daughter against her mother, a mother-in-law against her daughter-in-law and a daughter-in-law against her mother-in-law.”
There's much in this world that's sinful. Non-religious people can turn a blind eye, or pretend that everything's okay. Thankfully, Christians don't have that luxury. This, naturally, can lead to uncomfortable situations. At a bare minimum, I think anyone who's converted to Christianity can point to an old friend or two who it's become uncomfortable to hang around with anymore. And some people give up a lot more in converting. For example, a Saudi Christian was tortured and killed by her own father when she converted from Islam.
Ultimately, exterior peace in this lifetime is a pipe dream. It's often false, papering over real conflicts. When people pine for “world peace,” it's worth asking how existing inequalities and injustices should be addressed. For example, when the NAACP started a concerted push for black civil rights, white Southerners often denounced them as “instigators.” That is, they upset the exterior peace of Jim Crow. The world is still like that: full of situations that need to be addressed. As Christians, we can't be lulled into an attachment with the sort of peace that simply accepts the status quo, sins and all.
II. What We Are Promised: Interior Peace
But Christ does promise a form of peace. It's interior peace, the peace of the soul. He's clear that this is something distinct form exterior peace in John 14:27, “Peace I leave with you; My peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid.” What He's describing is a peace of the soul, rather than the external absence of conflict.
So when the Bible refers to the “peace of Christ” (Philippians 4:7) or the “peace of God” (Colossians 3:15), it's not idle language. It's because this is an otherworldly peace, unlike what the world is capable of offering us. And when we offer the Sign of Peace during Mass, it's this sort of peace we're praying that the other person will experience: the interior peace of the soul.
III. Interior v. Exterior Peace
Often, we have to choose between exterior and interior peace. For example, imagine that an old friend of yours is doing something morally wrong: perhaps he's making blasphemous jokes, or making fun of disabled people. You can either (a) laugh along with it, or (b) object to it.
Plus, the underlying problem isn't solved: it's just lying dormant. And that's what makes this form of exterior peace so risky: it's often false. We end up just avoiding conflict, and putting a band-aid over a real moral problem. Or, as God puts it in Jeremiah 6:14, “They dress the wound of My people as though it were not serious. ‘Peace, peace,’ they say, when there is no peace.”
On the other hand, if you object, you've got exterior division. You have to address a situation you probably don't want to address, and you're risking losing your friendship forever. But in risking this division, you gain interior peace. You can rest easy knowing that you're right with the One who matters, and that He'll take care of you. Your friend may be annoyed with you, but your conscience isn't. Plus, if this friendship is healthy, things will probably end up better off for it. Your friend may actually learn something from the correction, and become a better person. These sorts of conflicts have a way of drawing people together.
Father Jean de Brébeuf, whose feast we celebrated yesterday (along with St. Isaac Jogues), provided us a great example of interior peace, when he wrote in his diary:
I have experienced a great desire to be a martyr and to endure all the torments the martyrs suffered . . . My God, even if all the brutal tortures which prisoners in this region must endure should fall on me, I offer myself most willingly to them . . .That's intense. No matter how grim the external situation, St. Jean de Brébeuf was prepared to face it joyfully, and offer it up to God, in both good times and in bad. He didn't have exterior peace: in fact, he was about to be tortured and killed. But he was at peace inside.
Of course, external peace isn't bad. In fact, St. Paul tells us that “if it is possible, as far as it depends on you, live at peace with everyone” (Romans 12:18). We shouldn't be part of the problem. But we also shouldn't be afraid to address problems, when they arise. One of the last things Jesus said to His Apostles before His Death is recounted in John 16:31-33:
“You believe at last!” Jesus answered. “But a time is coming, and has come, when you will be scattered, each to his own home. You will leave Me all alone. Yet I am not alone, for My Father is with Me. I have told you these things, so that in Me you may have peace. In this world you will have trouble. But take heart! I have overcome the world.”This, or rather, He is the source of our peace. No matter how bad things get for us, or even how badly we fail, Jesus remains in control, and He's already Victorious.