Spiritual Progress

I have just read 2 Peter 1:2-11.

The foundation for spiritual progress described in vv. 5-7 is found in vv. 2-4.

The foundation is:
1) Grace & peace multiplied to us
2) the knowledge of God and of Jesus
3) divine power given to us
4) great and precious promises
5) partakers of the divine nature
6) escaped the corruption of the world

These are the reality of what we have been given in Jesus Christ by grace through faith. Therefore, because all of this is by grace through faith, we are enabled to "give all diligence" to "add" to our faith in vv. 5-7.
1) virtue
2) knowledge
3) self-control
4) perseverance
5) godliness
6) brotherly kindness
7) love

Now read 2 Peter 1:8

How is our spiritual progress? Have we become spiritually sluggish (Hebrews 5:11-14)?