I think it's about your attitude towards fear.
I broke my arm ice skating with friends aged 11. My mother went mad, wouldn't let me go out with them again. A couple of years later I had an utterly horrific skiing accident that put me in hospital for a very, very long time. I became scared of everything because I was shielded from everything.
Mid-twenties, life is very different. I've deliberately put myself in a lot of dangerous situations and no longer find myself scared or fearful of a lot of things. So, I decide to get back on the ice. Most people's biggest fear of ice skating is just falling over simply because it's going to hurt. I didn't care any more, I told myself I didn't have the time or energy to waste on the fear of it. The fear, in this case was going to get in the way of achieving what I wanted. If you hurt yourself, it's going to heal. You get a bruise, it will go away. So I started playing an on-ice sport. I get knocked about, hit, beaten, hurt, smashed, bruised, abused all the time. I fall over, I get pushed over, people deliberately set out to hurt me and not once have I experienced fear in the process.
It's led to a massive change overall in life. I'm more confident, I find myself able to take on situations I couldn't before. My interviewing technique is far better. In the handful of threatening situations I've found myself in, I've been able to "square up" to people instead of backing down if I'd been scared.
The only thing now that stops me doing some of the childish things I used to do is pain. I feel mentally younger for it, I wish I felt physically younger too!