Read 2 Peter 1:10 Using Other Translations
Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall:
Therefore, brothers, be all the more diligent to make your calling and election sure, for if you practice these qualities you will never fall.
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.