Lama Ole’s answer:
If one has understood the emptiness of mind, one becomes fearless. Emptiness and fearlessness are inseparable. My parachuting accident benefitted me a lot because it gave me the chance to confirm that I really have no fear. It affirmed that I don’t just talk about something and stay superficial. I have checked it out and it is true.
Once one has had such an experience, one gets some distance from many things that simply don’t matter. Many beliefs and concepts become obsolete—one just doesn’t need them anymore. This is the most important part of becoming fearless.