John Nelson Darby expounds on Luke 4, illustrating how Jesus, filled with the Holy Spirit, embraced His role as a servant and was publicly tested in the wilderness. He emphasizes that Jesus' obedience and dependence on God were paramount, as He faced temptations from Satan without succumbing to them. Darby highlights that Jesus' mission was to preach grace to the poor and marginalized, demonstrating God's power and love through His actions. The sermon reflects on the significance of Jesus' humility and the rejection He faced, yet He remained steadfast in fulfilling His Father's will. Ultimately, Darby encourages believers to follow Christ's example of obedience and reliance on God's word in their own lives.