If we are diligent to develop the virtues mentioned in verses 5 through 7, we shall confirm, make sure, our calling and selection.

[jidong xiao]

在十节彼得继续说，“所以弟兄们，应当更加殷勤，使你们所蒙的呼召和拣选坚定不移；你们行这几样，就永不失脚。”这里的殷勤，即在神圣的生命里发展属灵的美德，在神圣生命的成长里往前。这使神对我们的呼召和拣选坚定不移。

我们若殷勤发展五至七节所题的美德，就会证实我们的呼召和拣选。我们绝不会疑惑我们已蒙神呼召，且蒙祂拣选。然而，有些人也许怀疑神是否拣选了他们。他们疑惑这事，原因是他们缺少彼得所列举的美德。但我们若发展这些美德，并由这些美德构成，就会证实我们蒙了呼召和拣选。这就是使我们所蒙的呼召和拣选坚定不移。不但如此，我们行这几样，就永不失脚，因为我们已彻底被构成。

In verse 10 Peter continues, "Wherefore, brothers, be the more diligent to make your calling and selection firm, for doing these things you shall by no means ever stumble." Here to be diligent is to develop the spiritual virtues in the divine life, to advance in the growth of the divine life. This makes God's calling and selection of us firm. 

If we are diligent to develop the virtues mentioned in verses 5 through 7, we shall confirm, make sure, our calling and selection. We shall never doubt that we have been called by God and selected by Him. However, some may question whether God has chosen them. The reason they have doubt concerning this matter is that they lack the virtues listed by Peter. But if we develop these virtues and are constituted of them, we shall have the confirmation that we have been called and selected. This is to make our calling and selection firm. Furthermore, in doing these things we shall never stumble, because we have been thoroughly constituted.