I used to joke about Philippians 1:21, usually before doing something dangerous. The joking isn't necessarily wrong, but there is a huge gap between the "gain" by Paul if he were to die in prison and the "gain" I would have if I were to die just going about life normally or doing something stupid. My gain would be personal, I would get to be with Christ. Watching the Insanity of God and reading Tortured for Christ really nailed in the fact that Paul's idea of gain isn't just getting to go to heaven, but the impact it will have on those around him who he would leave on earth. Dieing in prison, and never once cursing at the guards, always being loving to your last breath, is a testimony to the guards and the other prisoners and everyone who hears. Paul's idea of gain is focused on those around him, and how they would benefit and how the gospel would be spread both in his life and in his death.