Difficult times will always come, but it's your choice whether you let it affect you or not. YES, happiness is a choice!
One theory in psychology research suggests that we all have a happiness "set-point"that largely determines our overall well-being. Our general happiness-level is around this set point, and you'll become happier when something positive happens or the opposite, afterwards returning to equilibrium.
But this set-point, to a certain extent, can be reset. Although our general mood levels and well-being are partially determined by factors like genetics and upbringing, roughly 40 percent of our happiness is within our control, according to some experts, and a large body of research in the field of positive psychology has shown that happiness is a choice that anyone can make. As psychologist William James put it, “The greatest discovery of any generation is that a human can alter his life by altering his attitude. We at Young Happy Minds intend to show you some of those tricks on how you can learn to control those 40 %. :)
Excerpts taken from an original post by Carolyn Gregoire for Huffington Post, 12/13/2013