Thomas Brooks emphasizes the concept of divine justice, arguing that those who have sinned and deserve punishment should not complain when they face consequences. He uses the analogy of a person deserving a hanging who should not blame the judge for cruelty if they only receive a lesser punishment. Similarly, he points out that we, who deserve condemnation, should not accuse God of harshness when we experience discipline instead of ultimate judgment. This perspective encourages humility and gratitude for God's mercy in our lives.