For I am suffering these things [See verse 8] for this reason [i.e., because of being a Gospel preacher]. Yet I am not ashamed because I know whom I have believed in [i.e., Jesus], and I am convinced that He is able to guard what I have entrusted to Him [i.e., Paul's spiritual well-being] until that day [i.e., the day of judgment].

Do your best to present yourself as a worker who is approved by God [and] does not have to be ashamed, [because you are] accurately handling [i.e., explaining] the message of truth.

But they will not advance any farther [in their sin] because their foolish ways will become obvious to everyone, just as those of Jannes and Jambres were.