Don't worry. Really.

Bill Roberts looks at anxiety and Mt. 6:25-24:

For many of us, worry is something that we wrongly think comes at us from the outside. And yet in the Bible anxiety is rightly shown to be something we do, and that we should not do. "Do not be anxious" is a command, much like "rejoice!" is a command. It is in our power to refuse anxiety, and Christ tells us to do so.

Amen. I recommend Bill's whole article.