I'm continually trying to make choices that put me against my own comfort zone. As long as you're uncomfortable, it means you're growing.
There are two types of courage involved with what I did. When it comes to picking up a rifle, millions of people are capable of doing that, as we see in Iraq or Vietnam. But when it comes to risking their careers, or risking being invited to lunch by the establishment, it turns out that's remarkably rare.