I would cling to unhappiness because it was a known, familiar state. When I was happier, it was because I knew I was on my way back to misery. I've never been convinced that happiness is the object of the game. I'm wary of happiness.
Happiness, Misery
This was the tricky bit. The really tricky bit, trickiness cubed.
Humour
It was the sheer variety of the pain that stopped me from crying out. It came from so many places, spoke so many languages, wore so many dazzling varieties of ethnic costume, that for a full fifteen seconds I could only hang my jaw in amazement.
Pain