Fail! This has to be the best teacher in the world. However, it is also the harshest. No one learns as much through failing at a task than anything else. Yet, we can already sense the reader looking at these lines with a bit of confusion. Should I be devastated or completely shattered after a failure? The answer is yes, you should be but it is also a humbling experience.
When one fails you realise just how bad things can get. Once you have that perspective, the overall fear is nearly wiped out. When one falls off a bicycle at a young age they realise that apart from a few scrapes and bruises it isn’t that bad. This gives them the confidence to ride harder and faster.
Succeed! Success breeds its own confidence and it is different from the one previously explained, while that is more of a humbling confidence, this type of confidence is based on knowing how good things can get. Succeeding at a task once will make you believe in yourself and your capabilities more, thus raising your confidence and self esteem.
However, success does not mean winning the Nobel Prize, but rather set small targets for yourself and keep increasing them. If you are jogging, try to run for 3 minutes on the first day, 4 on the second and so on. When you hit these targets you will become more confident towards the next one. That is the key, whether you fail or succeed you can use it to motivate yourself and over time the confidence will come on its own.