Rapidity.
It astounds me how rapid things can happen in one’s internal perception of life around them. Personally, I can go from depressed to elated in a three day span. Perhaps some medical people call this rapid-cycle bi-polar disorder, but I wouldn’t know as I sleep everyday and I’m a miser with cash. Anyhow, some focus, some tea, a commitment to the discipline of meditating, cognitive restructuring, and some form of hope/faith/confidence/et cetera, does the trick.
Sleep, sunlight and Vitamin D help, too.

