The sermon explores the themes of divine power, unwavering commitment, and complete redemption through the narrative of the plagues in Egypt. Examining Pharaoh's attempts at compromise and the Lord's hardening of his heart, the message emphasizes that God's plan is to fully deliver His people, body and soul, mirroring the shepherd's determination to reclaim every lost sheep. Drawing on Spurgeon's insights, the sermon underscores that God's grace extends to all, even the seemingly weakest and most flawed, assuring believers that nothing will prevent their ultimate salvation and reunion with Him, leaving no one behind.