Thomas Brooks emphasizes the stark contrast between the fervor displayed in pious duties and the coldness that often follows when individuals step away from these practices. He points out that many appear vibrant and spiritual while engaged in religious activities, yet become lifeless and worldly outside of them. This inconsistency suggests a lack of true holiness or only a minimal attainment of it. Brooks calls for a deeper, more genuine spirituality that transcends mere duty and reflects a true relationship with God.