They say change gets more difficult as we get older - each year we're more stuck in our ways, more reluctant to learn something new.

Before I published anything, I dreamed of publication, but I didn't actually write for it. I imagined that writing for an audience was something for fancier people. I aspired, but mostly I wrote for myself. I wrote because it made me happy.

My own habit had always been to write about the things that ticked me off in a given day. If I kept a journal at all, I kept it to vent.

The first person who ever told me that happiness was work was this manic-depressive artist I knew when I was in my 20s. I was like, 'What are you talking about? Happiness just happens. That's even the root of that word. How could it be work?

In all of my looking at happiness, one thing I noticed right away is that the opposite of happiness isn't unhappiness or even depression, it's anxiety. It is something that can constantly block our happiness, or our chance to reach that sort of meditative state in our work or our home lives.

When we strike a balance between the challenge of an activity and our skill at performing it, when the rhythm of the work itself feels in sync with our pulse, when we know that what we're doing matters, we can get totally absorbed in our task. That is happiness.

Your heart is the size of your fist; keep loving, keep fighting.