Joseph discussed the importance of peace of mind, emphasizing that it is the most valuable thing one can possess. He shared an essay titled "The One ThingThat Matters" by Emmett Fox, which highlights the significance of peace of mind in overcoming life's challenges. Joseph also shared his approach to helping his children when they are upset, which involves breathing calmly and actively listening to their concerns. He highlighted the value of this approach in bringing peace to a situation and facilitating communication and problem-solving.