The secret of self-confidence is to do the right thing for the long term. A sense of self-confidence is actually a sense of control over the future, believing that you can become the person you want to be in the future, believing that you can earn money, and so on. The sense of control over the future comes from the progress of the present, and if you insist on doing the right thing and doing the long-term thing every day, this sense of control will become stronger and stronger.