Marcus Aurelius, Roman Emperor over the period 121 A.D. to 180 A.D., is reputed to have said, "Happiness depends upon the quality of your thoughts. Entertain no notions unsuitable to virtue and reasonable nature."
I have to admit that I am very happy most of the time. However, in accordance with the universal Law Of Rhythm, no one can be that way all the time. There is an ebb and flow to all of life. If it were not so, we wouldn't know what happiness is! So, as much as I would like to be very happy all the time, I understand that this just cannot be. For every up there is a down, but as Marcus Aurelius said, if you keep your thoughts in tune with the Universe, the downs will be quite shallow and very short lived.
As goes the song; "Don't worry. Be happy!"
Happiness lives at The Life Abundant