18 This charge I commit unto thee, son Timothy, according to the prophecies which went before on thee, that thou by them mightest war a good warfare;
19 Holding faith, and a good conscience; which some having put away concerning faith have made shipwreck:
20 Of whom is Hymenaeus and Alexander; whom I have delivered unto Satan, that they may learn not to blaspheme.
Paul reminds Timothy of his responsibility, and that a lot of people are counting on him to make the right decisions and be a beacon of good in the darkness. It was a difficult position to be in, and easy to falter, so Paul chose to use martial terms to describe the young man’s path. These are not literal– “war a good warfare” doesn’t mean pick up a sword and run about with it, rather he is encouraging Timothy to stand strong for what is right and good no matter what other people do or say.
He points out two people– Hymenaeus and Alexander, who apparently gave way to temptation and derision. Paul tells Timothy that they did not keep the faith and ignored their conscience. As a result, he was forced to sternly rebuke them in an extremely serious fashion. This is a “don’t let this happen to you” moment as Paul warns against the evils of losing faith. He gives the parallel of a shipwreck– a few wrong decisions in navigation can send the ship smashing onto rocks and its crew drowning. We too, if we stop listening to our conscience and do whatever we feel like at the time, can lose direction and smash into rocks as well. In the third Star Wars prequel– Episode 3: Revenge of the Sith, a young man starts making a few wrong choices that turn him from being a mostly good person into the evil Darth Vader. It doesn’t take much, so pay attention to your conscience and keep the faith!