As well as the usual kind of stress, there's good stress, also known as eustress, an awkward sounding word, like someone calling a lost dog whose existence they've ceased to believe in but hoping, somehow, that it might return. When bad stress lifts we imagine we're no longer stressed at all though everything, of course, is stressed at all times, a violin, the joy of a lost dog found again. A certain tension is necessary to keep things from collapsing into stray molecules, flotsam, even when we're so relaxed we could drift away, floating.