On January 13, 1972, Yogi Bhajan, Master of Kundalini Yoga and teacher of the psychology of Happiness, put it this way:

“Happiness is your birthright. It cannot be taken away from you. But you act as if it is not your birthright. You begin to wish for happiness rather than accept it and express it. When you wish for happiness, you also wish indirectly for unhappiness, just as night and day follow each other. When you wish, every happiness is followed by sadness and every sadness by a happiness. You are not happy because you make comparisons and compete with something over which you have no control. You have no control over infinity—the vast, creative essence of life and consciousness. If you have no control over infinity, don’t try and control it. Flow with it and you can reach anywhere! Fight with it and you’ll be unhappy. There’s nothing to it. The only problem is you have not consciously developed your mental caliber, meditative mind, and the attitude of gratitude and contentment.
The mind should dance with the body, the whole Universe is your stage, the soul your choreographer. Try to feel that whatever you are doing is the most beautiful thing, the prettiest dance, because you dance with the whole Universe. Don’t resent anything. Forgive everything. Express your essence. Let your heart guide you, free of all limitation, regimentation, and fear.”