Therefore, brothers, be more diligent to make your calling and election sure. For if you do these things, you will never stumble.
ExplanationCommentary
Verse 10. By good works you may make sure, and so forth without diving into the hidden mysteries of predestination, and so forth—You shall not sin at any time. These words evidently suppose, that the graces and assistances of God will not be wanting; for it would be in vain to command, unless a man had both free will and capacity to perform. But, as it follows, these helps shall be abundantly ministered to you. Witham.
The word for “brothers” here and where context allows may also be correctly translated “brothers and sisters” or “siblings.”