How about just plain ol' diligence to make our calling and election sure?
1 Simon Peter, a servant and apostle of Jesus Christ,
to them that have obtained a like precious faith with us in the righteousness of our God and the Saviour Jesus Christ:
2
Grace to you and peace be multiplied in the knowledge of God and of Jesus our Lord;
3 seeing that
his divine power hath granted unto us all things that pertain unto life and godliness, through the knowledge of him that called us by his own glory and virtue;
4 whereby
he hath granted unto us his precious and exceeding great promises;
that through these ye may become partakers of the divine nature, having escaped from the corruption that is in that world by lust.
5 Yea, and for this very cause
adding on your part all diligence, in
your faith supply virtue; and in
your virtue knowledge;
6 and in
your knowledge self-control; and in
your self-control patience; and in
your patience godliness;
7 and in
your godliness brotherly kindness; and in
your brotherly kindness love.
8 For
if these things are yours and abound, they make you to be not idle nor unfruitful unto the knowledge of our Lord Jesus Christ.
9 For he that lacketh these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.
10 Wherefore, brethren, give the more diligence to
make your calling and election sure: for if ye do these things, ye shall never stumble:
11 for
thus shall be richly supplied unto you the entrance into the eternal kingdom of our Lord and Saviour Jesus Christ. 2 Pet 1
IME, there is a joy (apart from anything else in this world) to be had in working out one's own personal salvation with Christ; the unregenerate can never know this joy.