Verse 16 In which; in which things, that is, in the truths revealed in respect to the end of the world and the general judgment. The difficulties which the apostle here refers to are not difficulties in Paul's writings, but in the subject which he has himself been discussing. This the original conclusively shows.--Which they that are unlearned and unstable wrest; in the manner already explained in 2 Peter 3:3-5.