This letter is not the apostle Paul’s final letter to Timothy; however, it is one of his last–Titus and 2nd Timothy will follow.
In it, Paul is instructing a younger pastor on how to continue to fight the good fight of the faith. The key to winning the war is teaching sound doctrine. There were two men whom Paul knew neglected sound doctrine, and their faith was made shipwreck.
He instructs Timothy on how to organize the churches in Ephesus: Find men who desire a good work and meet the qualifications of an overseer and a deacon. Women are not to take over the authority of a man and are not to lead men in teaching. Neither, Paul says are women to be appointed as overseers. That office God has reserved for a man.
Don’t err concerning the faith are Paul’s final words to Timothy in this letter.