J.R. Miller addresses the pervasive issue of bad temper, revealing that over half of people exhibit some degree of it, often without recognizing their own faults. He emphasizes the importance of kindness, compassion, and forgiveness, as modeled by Christ, and encourages individuals to actively work on controlling their tempers rather than allowing them to dominate their lives. Miller illustrates that bad temper not only harms oneself but also negatively impacts relationships with others, urging a transformation towards a more loving and patient disposition. He concludes that achieving a good temper requires deliberate effort and self-discipline, as well as a commitment to reflect Christ's character in our interactions.