elation/depression

"Most people have little objection to getting elated, but none of us are very eager to see depression setting in. We don't mind being told not to get depressed, but "don't let yourself get elated" may have a puritanical ring to it. Steering a middle course between elation and depression is not resigning ourselves to a flat and monotonous life-far from it. There is a third state which is neither elation nor depression, and if we can go beyond these two extremes, we will find the abiding joy which is our real nature."

-Ecknath Easwaran, The Mantram Handbook