Passion has little to do with euphoria and everything to do with patience. It is not about feeling good. It is about endurance. Like patience, passion comes from the same Latin root: pati. It does not mean to flow with exuberance. It means to suffer.
Mark Z Danielewski

Lydia - Back To Bed

I wish I could throw off the thoughts which poison my happiness. And yet I take a kind of pleasure in indulging them.
Frederic Chopin
And when you gaze long into an abyss, the abyss also gazes into you
Friedrich Nietzsche