Quote by Roy Baumeister
"Happiness is not a constant state but a fleeting achievement."
More from Roy Baumeister
"The self is not a thing but a process. It is something you do, not something you have."
"One of the most universal cravings of our time is a quality of identity and allegiance."
"Willpower is like a muscle. The more you use it, the stronger it gets."
"Self-control is strength. Calmness is mastery. You have to get to a point where your mood doesn't affect your productivity."