Discover this stable and enduring sense of inner peace, a peace that lasts through all sorts of trials and tribulations. Serenity is a sense of inner peace that is not subject to the whims of the outside world. People with serenity know that they're safe and good. People with serenity understand that life will throw them curveballs and that many-or maybe even most—of their plans won't work out. They don't take this personally, because they know that trying to bend the world to their will simply doesn't work.