2 Peter 1:8 (ESV): 8 For if these qualities are yours and are increasing, they keep you from being ineffective or unfruitful in the knowledge of our Lord Jesus Christ.
Peter begins this second letter with the assurance that God gives us everything we need for life and godliness. Then, he challenged his readers to add to their faith certain qualities: excellence, knowledge, self-control, steadfastness, godliness, brotherly affection, and love.
If we possess these, we will not be ineffective or unfruitful spiritually. In verse 10, he also assures us that if we practice these, we will never fall spiritually.
The second chapter contrasts the believer who follows after these qualities with false prophets who bring in destructive heresies and act wickedly.
These verses give us the secret for a spiritual life that is effective, fruitful and faithful. Therefore, the application is clear: we must intentionally seek to increase in these qualities through the empowerment of the Spirit.
Heavenly Father, help me to be faithful to do what is necessary to grow spiritually and serve you faithfully. Amen.