People have their own various interesting takes on happiness. Don Marquis was reported to have said, "Happiness is the interval between periods of unhappiness." Schweitzer said, "Happiness? That is nothing more than health and a poor memory."
William Lyon Phelps provided an interesting insight when he said, "If happiness truly consisted of physical ease and freedom from care, then the happiest individual would not be a man or woman; it would be, I think, an American cow."
Christians know that true happiness and joy will come, not from outward circumstances, but from the One who came to give us abundant life.