Ephesians 1:13,14 “In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise, Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.”
When someone believes on the Lord Jesus Christ, which is the news of the Gospel, they become a child of God. Their sins are forgiven, they are put into the family of God, and they are given a new nature.
The new nature is the Person of the Holy Spirit. He moves into the heart of the individual and makes him or her a “new creature in Christ” (II Cor. 5:17). The above verses reveal that the Holy Spirit becomes our “seal,” or evidence of ownership by God Himself.
He is in the newly saved person “until the redemption of the purchased possession.” The redemption spoken of here is not a reference to salvation, but to the time when Jesus comes to take His people to glory. This speaks of the Rapture.
The indwelling presence of the Holy Spirit becomes the “earnest,” or downpayment of salvation. His presence and working in your life is proof that you have been purchased by the blood of Christ. Romans 8:9 says that “Now if any man have not the Spirit of Christ, he is none of his.”
He will be there in your heart until the Rapture and will not leave before it takes place. This guarantees salvation.
Certainly, it is something to praise Him for. Like He said in Hebrews 13:5: “I will never leave thee, nor forsake thee.”