“why is it that happiness can disappear in an instant but sadness stays around forever?”

“It wasn't the disappearance of happiness so much as the appearance of sadness.”

“your life can change in an instant. that instant can last forever.”

“Its not just a smile of momentary happiness. When it disappears from my face, it will stay with me.”

“Some things stay forever, but most of the exercises, practices, and teachings end up disappearing down a black hole. Or so it seems.”

“I think we mistake sadness for depression, because life is basically sad, and its the failure to recognize that that leads to this sort of resentment and bewilderment [...] It is, it is, and [..] you know, people just suddenly think that the world owes it to them to be happy, and they're not happy and then they think well, why aren't I happy, and makes 'em angry and then they're depressed about the fact that they're angry and they're bitter about the fact that they're depressed, and this downward cycle; why don't they just accept that life is sad and cheer up, it's not forever.”