2 Peter 1:10-14

So, dear brothers and sisters, work hard to prove that you really are among those God has called and chosen. Do these things, and you will never fall away. Then God will give you a grand entrance into the eternal Kingdom of our Lord and Savior Jesus Christ. Therefore, I will always remind you about these things—even though you already know them and are standing firm in the truth you have been taught. And it is only right that I should keep on reminding you as long as I live. For our Lord Jesus Christ has shown me that I must soon leave this earthly life