D.L. Moody shares a personal story from his childhood about how he learned to approach his mother during punishment, illustrating that drawing near to God during times of chastening can lighten our burdens. He emphasizes that while we may not understand our suffering now, God is working all things together for our good, just as a druggist carefully mixes ingredients to create the right medicine. Moody reassures us that even in sorrow, there is purpose and comfort in God's plan, reminding us that every trial can lead to growth and understanding.