Happiness (or normality or stability — whatever you want to call it) isn’t a permanent gift granted to a select and steady few. It may be found more easily for some than others, but it’s all still just a transitory phase.
Every emotional state, stable or otherwise, is impermanent. It’s all a shifting, flowing, ever-changing hot mess of pleasure and pain, neuroses and normative behavior. Happiness is fleeting, but then again, so is suffering.
“Raise your words, not your voice. It is rain that grows flowers, not thunder.”