C.H. Spurgeon emphasizes the profound truth that God, having given us His Son, Jesus, will not withhold anything else we need. He illustrates that this promise is not just a single assurance but a treasure trove of blessings, highlighting the abundance of God's grace and generosity. Spurgeon encourages believers to approach God with confidence, knowing that their requests are met with His overflowing love and willingness to provide. The sermon reassures that there is no limit to what God can give, as He has already given the greatest gift of all. Ultimately, it calls for trust in God's provision for all our needs.