Once I started trying to give positive reviews, though, I began to understand how much happiness I took from the joyous ones in my life---and how much effort it must take for them to be consistently good=tempered and positive. It is easy to be heavy; hard to be light. We nonjoyous types suck energy and cheer from the joyous ones; we rely on them to buoy us with their good spirit and to cushion our agitation and anxiety. At the same time, because of a dark element in human nature, we're sometimes provoked to try to shake the enthusiastic, cheery folk out of their fog of illusion---to make them see that the play was stupid, the money was wasted, the meeting was pointless. Instead of shielding their joy, we blast it.
Gretchen Rubin, The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun
happiness, joy, optimism, pessimism