During the past month, I experienced a growth in confidence in many activities that are part of my life. I became more confident doing hard trail runs, driving aggressively and speaking to other people.
Confidence improves your performance in almost every aspect. The lack of hesitation will make you a better person. For example, when I was running a trail in Yosemite last week, two persons that were way more physically capable than me tried to run against me. Even being less physical than them, I won the race because I was feeling confident enough taking risks and making bigger jumps between rocks.
However, there is a caveat. The more confidence you acquire, the more you will be willing to take risks that can put you in danger. Let’s take the common example of driving. During your first month driving, you don’t feel confident enough to drive aggressively. You’re afraid that you’ll crash or do something wrong. With more experience, you start to try new things. You’ll drive faster when there’s no one in the street. And then you’ll take even more risks until it comes the day when you crash.
One way to be safe and still enjoy your confidence is trying sensitizing yourself with knowledge and emotions. One can, for example, seek to watch videos of car accidents to let them think about the consequences of their action or research about people who broke a leg after doing challenging "parcours".