You were sealed in Him with the Holy Spirit of promise, who is given as a pledge of our inheritance (Ephesians 1:13–14)
As one means of guaranteeing His promises to those who have received Jesus Christ, God has sealed [them] in Him with the Holy Spirit of promise. Every believer is given the very Holy Spirit of God the moment he trusts in Christ. “You are not in the flesh but in the Spirit, if indeed the Spirit of God dwell-s in you,” Paul declares (Rom. 8:9a). Conversely, he goes on to say, “If anyone does not have the Spirit of Christ, he does not belong to Him” (v. 9b). Incredibly, the body of every true Christian is actually “a temple of the Holy Spirit who is in [him]” (1 Cor. 6:19).
When a person becomes a Christian, the Holy Spirit takes up residence in his life. Life in Jesus Christ is different because the Spirit of God is now within. He is there to empower us, equip us for ministry, and function through the gifts He has given us. The Holy Spirit is our Helper and Advocate. He protects and encourages us. He also guarantees our inheritance in Jesus Christ. “The Spirit Himself bears witness with our spirit that we are children of God, and if children, heirs also, heirs of God and fellow heirs with Christ” (Rom. 8:16–17). The Spirit of God is our securing force, our guarantee.
The sealing of which Paul speaks here refers to an official mark of identification that was placed on a letter, contract, or other important document. The seal usually was made from hot wax, which was placed on the document and then impressed with a signet ring...