Why is it difficult to keep a joyful feeling in?

You might know this the same way I do. A quick rush, a sudden burst of pure joy inside that instantly eradicates all negativity in the world. You even feel love for the people you normally dislike. So you give someone a call. You feel like saying I love yous. You are happiness.

And then without you being aware, it’s all gone. You are then caught up in a slow build up to being totally anxious about something and immediately behind that, some bit of anger, probably.

So what gives? Is this how it should be and as good as it gets short of acquiring anti-depressants? Are there any natural means to get this blissful feeling back and keep it longer. It feels so good and I want it most of the day! Is that wrong?