Thomas Brooks emphasizes that God's heart is not inclined to afflict His children, as seen in Lamentations 3:33. He explains that while God may allow hardships, it is not His desire to cause grief, likening His mercy to honey and His punishment to a bee's sting, which only occurs when provoked. Brooks reassures believers that God's heart yearns for them even during times of affliction, as illustrated in Jeremiah 31:18-20. He highlights that God's actions do not always reflect His heart, urging Christians to trust in His loving nature despite their circumstances.