Engagement is all about care. Jesus cared for his disciples & challenged them/us to love one another. He modeled agape love beyond culture in life & death.
Two encounters are critical. First, the leader encounters God in His Word and is changed. Second, the leader guides the group to have a life-changing encounter.
In John 13:34-35, three times Jesus said, “Love one another.” Your group is the ideal place to practice and launch the kind of love for one another that shows the world that we are His disciples.