If you don’t believe you can do it you can’t. If you believe
you can do it, and that belief is founded on actual experience, on
truth, then you can. You cannot out-perform your self-image, unless
pushed beyond it by something out of your control. Progress and
overcoming can be driven by one or two acts: do the work, practice,
pay attention, improve performance to the degree that self-image
evolves, dragging performance with it, or take the headlong dive into
a situation you may not be equal to and hope to God you are more
capable than you believe.