What exactly is "Salvation" in this game?

Narumi (L1): Alright, if I get stronger like this, saving all beings won't just be a dream! (Victory Line) (After summoning a golem, beating up the enemies, and then casting "Wall of Thunder Strike" to defeat them all) Aiki (C5<): Why are you running away? This is salvation. (In-game Line during a wave) (Bringing a tank) Wouldn't anyone run away if a tank charged at them? What exactly is "salvation" in Touhou LostWord?