I believe God keeps those He has, but I also believe a man in love doesn't have to tell you that he is, so the works portion is a bit moot for me. I don't do out of a sense of impending doom should I fail to do, but I do because I love God and loving God desire to find my pleasure in His pleasure.
Amen, as opposed to all those who fret and fear and point fingers and obsess about what is being done or not done. They think on those things without ceasing.
Those with assurance of salvation have a peace that passes all understanding, and we think on other things entirely.
Philippians 4:7-8
And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus. Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.