Zac Poonen emphasizes the importance of allowing the peace of Christ to act as a referee in our hearts, guiding us when we stray from God's will. He illustrates this with a football analogy, explaining that just as a referee signals fouls, our conscience alerts us when we have done wrong, requiring us to make amends before moving forward. Poonen stresses that if we ignore this inner referee, our actions, no matter how good, will not be counted until we set things right. He encourages believers to recognize agitation as a sign that the peace of Christ has been disrupted and to take immediate steps to restore that peace. Ultimately, he calls for obedience to this inner peace to ensure we remain aligned with God's will.