From Chapter 30 of A Thousand Names for Joy by Byron Katie:

At forty-three, after ten years of deep depression and despair, my real life began. What I came to see was that my suffering wasn't a result of not having control; it was a result of arguing with reality. I discovered that when I believed my thoughts, I suffered, but that when I didn't believe them, I didn't suffer, and that this is true for every human being. Freedom is as simple as that. I found that suffering is optional. I found a joy within me that has never disappeared, not for a single moment. That joy is in everyone, always. When you question your mind for the love of truth, your life always becomes happier and kinder.

Inquiry helps the suffering mind move out of its arguments with reality. It helps us move into alignment with constant change. After all, the change is happening anyway, whether we like it or not. Everything changes, it seems. But when we're attached to our thoughts about how that change should look, being out of control feels uncomfortable.

Through inquiry, we enter the area where we do have control: our thinking. We question our thoughts about the ways in which the world seems to have gone crazy, for example. And we come to see that the craziness was never in the world, but in us. The world is a projection of our own thinking. When we understand our thinking, we understand the world, and we come to love it. In that, there's peace. Who would I be without the thought that the world needs improving? Happy where I am right now: the woman sitting on a chair in the sunlight. Pretty simple.

^z - 2014-11-07