2 Peter 1:9-12

But whoever does not have them is nearsighted and blind, forgetting that they have been cleansed from their past sins. Therefore, my brothers and sisters, make every effort to confirm your calling and election. For if you do these things, you will never stumble, and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ. So I will always remind you of these things, even though you know them and are firmly established in the truth you now have.