Your belief in yourself drives away all doubt.

Belief does not win arguments with doubt. It moves first, and the doubt follows it around complaining, and gradually has less to say.

Anyone stepping onto a frozen lake knows the feeling. You test the edge, you shift your weight, and then you go. Not because the fear has gone but because the fear has been given a smaller job.

Acting on your own behalf while unconvinced is the ordinary form of this. It is what most people mean when they say they believe in themselves.