Being confident is the key to life. Don't be afraid to be you! I'm super different from a lot of kids my age with style and personality, and I'm OK with it. And if you are OK with it, everyone else will be, too. Just be yourself.
The art of life consists in taking each event which befalls us with a contented mind, confident of good. ... With this method ... rejoice always, though in the midst of sorrows, and possess all things, though destitute of everything.
Grand Slams are different. If you can get through a few matches, the draw opens up and you get confident. You just need a little bit of luck early, you get through those opening matches and you never know what could happen.
Scientists actively approach the door to knowledge—the boundary of the domain of what we know. We question and explore and we change our views when facts and logic force us to do so. We are confident only in what we can verify through experiments or in what we can deduce from experimentally confirmed hypotheses.
Unless you make tremendous efforts, you will not be convinced that effort will take you nowhere. The self is so self-confident that unless it is totally discouraged it will not give up. Mere verbal conviction is not enough. Hard facts alone can show the absolute nothingness of the self-image.