2 Timthy 4: Paul is about to be executed.

Paul is in Rome facing trials. He is about to be executed by Nero. Some "friends" left him and some opposed him. Perhaps, if I were Paul, I would ask: "was my life worthwhile"? However, Paul says to Timothy:

6-8 You take over. I’m about to die, my life an offering on God’s altar. This is the only race worth running. I’ve run hard right to the finish, believed all the way. All that’s left now is the shouting — God’s applause! Depend on it, he’s an honest judge. He’ll do right not only by me, but by everyone eager for his coming

or closer to the Greek:

8 in the future there is reserved for me the crown of righteousness, which the Lord, the righteous Judge, will award to me on that day; and not only to me, but also to all who have loved His appearing.

Paul is very sure that the Lord is on his side and that his life was worthwhile indeed.