Self-confidence is one of the most important things you can have in your life. It determines your success or failure, and if you don't have enough of it, it will erode your self-confidence. It's why when you go after a goal, you want to achieve something awesome, there's a voice inside that says, "well, you're not one that actually falls through what you say you're going to do, so I'm not sure I'm going to show up that way." And that voice is a huge part of self-worth.