"Blessed are the peacemakers for they shall be called sons of God." Mt 5:9 This, as I'm sure most Christians know, is from the beatitudes in the fifth chapter of Mathew. The commentators that I've read generally say The Beatitudes are traits of the redeemed or characteristics that all Christians should aspire to. All of chapters five, six and seven are teachings specifically given to the disciples and therefore we can be certain that His teaching is for the church, the body of believers. That being the case when Jesus gives a blessing to those who have the traits mentioned, it is something we should desire and pray for. "...They shall be called Sons of God." Those who are covered by the blood and accepted into the family of God. I think He is talking about peace within the fellowship, peace that we are to maintain with each other in the church. Jesus told us that they (the world) will know we are His because we love one another. We run into a problem when it comes to loving one another and being at peace with everyone, people. People seem to be the root cause of most of the problems in the world and in the church. Human beings are basically evil, selfish, grasping, arrogant, lazy, perverse and I could go on and on. The only solution to the Human Predicament (Sin) is Jesus Christ and Him crucified but even after someone is born-again they don't turn into angels overnight. There are tares in the wheat and if a church is really making a difference in the community and the world they will be under constant assault by a small army of demons working overtime. What's to be done? We could start by reading our bibles as the Word of God not some self-help book. Take to heart the teachings of Jesus and the admonishments in the epistles. Believing all of it, even passages we may not like or we think somehow don't apply to Christians today. God doesn't change why would His word.
"Lead a quiet life, mind your own business and work with your hands as we commanded."1Th 4:11