It is possible to experience peace and joy in the midst of persecution because we can rest in the certain glory of Christ, a glory that was peculiar from man's perspective as Jesus headed to the cross, yet this glory was also planned by God, purposeful, and pre-existing. In Christ we can stand against persecution and suffer for God remembering this certainty.
We all know children should honor and obey their parents, but the Ephesians 6 command to do so is far more than a mere order children must follow. It is a command full of promise and encouragement and even strength. The promise is the fruit of your obedience – that "it may go well with you" – not because your parents are perfect but because the maker of that promise is. Even when life or sin make it hard to obey or honor our parents, we can find encouragement and strength in the promise because we know God's plans and purposes will stand, and his plans are for our good.
Being "Agents of Peace" is made easier when we remember the truths of God's Word and our calling. Our calling is completely undeserved, so we must walk with humility and gentleness; our calling is a guaranteed process, so we can walk with patience for all; and our calling is to a unity of the Spirit visible to the world in our peace with one another, so we walk together: together in humility, gentleness, patience, and love.