When you heard the message of
salvation in Christ and believe in Jesus Christ, the Holy Spirit starts working
in you. The Bible says:
"In Him, you also, after
listening to the message of truth, the gospel of your salvation—having also
believed, you were sealed in Him with the Holy Spirit of promise, who is given
as a pledge of our inheritance, with a view to the redemption of God's own
possession, to the praise of His glory." Ephesians 1:13-14