"In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit, who is the guarantee of our inheritance until we acquire possession of it, to the praise of his glory. (Ephesians 1:14)"
This is a short version of my sermon that I gave two years ago and the emphasis at this time is that the Holy Spirit is the reason true believers cannot and will not lose their salvation. I hope those of you who have trusted Christ as the Savior will realize that you can't take credit at all for being saved forever because all the glory is due to God alone.
It is voiced!