Perpetual happiness is impossible simply because all of us have a range of emotions to experience in life. You cant be happy all time that would be so abnormal. Perpetual happiness can be faked but cant be genuine.
Happiness isn’t absolute and it has to be earned many a time. Many of us feel if happiness comes free to us we don’t deserve it, somehow after chasing it arduously, we feel we deserve to be happy.
Being completely happy all the time seems like a difficult task. Shouldn’t happiness be effortless? If I have to make an effort to be happy all the time, I would rather be unhappy. Its not as if happiness offers to you itself on a platter. Infact most of the time we make a big deal about happiness as if it were a rare entity.