C.H. Spurgeon emphasizes the assurance found in Psalm 138:7, where despite walking through troubles, believers can find confidence in God's promise to receive and save them. He encourages the faithful to recognize that troubles can revive their spirit and strengthen their faith, rather than lead to despair. Spurgeon reminds us that instead of retaliating against our enemies, we should trust in God's power to handle our adversaries, as He promises to protect and deliver us. The sermon calls for a heart that meditates on God's promises, transforming them into a song of confidence and a source of solace in holiness. Ultimately, it is a reminder to leave our burdens with the Lord, who is capable of performing all things for us.