"The greatest happiness you can have is knowing that you do not necessarily require happiness." --Wm. Saroyan, American writer about 1920.
That statement can give freedom and contentment by not trying to analyze why one is not "happy" at a particular moment. There is also freedom: one can go somewhere or do something without demanding it make give happy. Few things can measure up to this standard. Moreover, one is spared the disappointment and worry when not feeling happy. Does this mean one is unhappy? I don't think so. There's a lot of middle ground and a plethora of other emotions to feel. You can be neutral, which may lead to introspection and fresh ideas. Happiness is touted as a daily state by JWs ("true happiness"). Every day, every minute can change and emotions ebb and wane and are ever-changing. Is it realistic to expect to feel happy? Is it worth it? Things can be pleasant and enjoyable without making you happy. And it's okay to be UNhappy once in a while too, imo. By having unrealistic expectations, it can undermine a person to think something's wrong and needs to be fixed. We're human and maybe it's not normal nor required for us to be "happy." We can take care of requirements, but maybe happiness isn't one of them--at least not as a constant. After all, idiots can be happy all the time. Drunks can be very happy. And there's a difference between being cheerful and happy too. What do you think?