Happiness, in my opinion, is making your mind a more interesting place to live in. It does not mean eternal joy, because that is simply not realistic and if joy were constant it would become the norm and therefore we would be desensitized to it. Happiness is to generate enthusiasm and ignite curiosity.
Happiness is the desire to continue to experience. The times in my life when I am the most happy are when I am interested in something (living a passion) and I’m so engrossed in how this passion intrigues me that my other concerns seem to fall to the wayside.
I’m not saying this makes happiness more attainable, but I am saying that it makes it attainable. Our lives will never be constant, steady or predictable. Joy will come and go, as will sorrow and suffering. What makes all of it worthwhile is feeling as though you have a purpose and discovering that which compels your mind and soul.
I also believe that an element of happiness is acceptance of what you cannot change, but I don’t think it’s as pertinent as interest is. This, I believe, because there will always be something new to accept. There will always be something you are dissatisfied with, disappointed by or suffering from. This will not cease. Acceptance, while very important, will not solely bring you happiness, although it will bring peace, which is a crucial factor. Acceptance in combination with interest will.
What is love if not just interest, fascination, enthusiasm and the desire to continue an experience with someone? It is not a sustained sense of joy, although joyousness is a part of the experience of love. And when people say you have to love yourself, it means just that: be interested in what you’re doing, be enthusiastic for what you will do and desire to continue the experience that you’re having.