It's nice to wrap stories up with and ending akin to "they lived happily ever after", but that's not really how things work. In real life, there is no happily ever after. There is always another story. People have new experiences, new thoughts, and new struggles (both internal and external).
Peace, then, is not a destination, but a rest stop. It is the room to breathe and decompress between adventures. And while that may generally be a pleasant thing, there is a certain terror in peace.
You know that something is going to happen to you. You don't know what it is, and you don't know when it will happen, but you know it's coming sooner or later, and the sooner you prepare for it, the less it can catch you off guard.
But now your time of peace is anything but peaceful. It has become a quiet anxiety, always prepared, but not knowing what. Always vigilant, but kept in the dark.
Explore the terror of peace, and the madness it instills in the human mind. Compare it with normal tribulations and see which one ends up being more nerve-wracking.