2 Peter 1:5-9
5 So make every effort to apply the benefits of these promises to your life. Then your faith will produce a life of moral excellence. A life of moral excellence leads to knowing God better. 6 Knowing God leads to self-control. Self-control leads to patient endurance, and patient endurance leads to godliness. 7Godliness leads to love for other Christians, and finally you will grow to have genuine love for everyone. 8The more you grow like this, the more you will become productive and useful in your knowledge of our Lord Jesus Christ. 9But those who fail to develop these virtues are blind or, at least, very shortsighted. They have already forgotten that God has cleansed them from their old life of sin.

5 But also for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, 6 to knowledge self-control, to self-control perseverance, to perseverance godliness, 7 to godliness brotherly kindness, and to brotherly kindness love. 8 For if these things are yours and abound, you will be neither barren nor unfruitful in the knowledge of our Lord Jesus Christ. 9 For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins.

Why add things to our faith? Cos faith releases divine power.
Add:
Virtue=life of moral excellence,moral courage which overcomes difficulties, and governs the heart by curbing all action of the old nature. It is an energy by which the heart is master of itself, and is able to choose the good, and to cast aside the evil, as a thing conquered and unworthy of oneself. Choose to do the right thing even when it hurts

Knowledge=knowing God better,divine wisdom and intelligence to guide our walk: the heart is enlarged, sanctified, spiritually developed, by a more complete and profound acquaintance with God, who acts in the heart and is reflected in the walk. We are guarded from more errors-we are more humble, more sober-minded: we know better where our treasure is, and what it is, and that everything else is but vanity and a hindrance. It is therefore a true knowledge of God that is meant here.

By the realising knowledge of God, divine power becomes available and efficacious for all that appertains to life and godliness

Self-control
Perseverance=patient endurance, one bears patiently with others
Godliness
Brotherly kindness
Love