Daniel Kish : How I use sonar to navigate the world

                   
Daniel Kish : How I use sonar to navigate the world (transcript)
Summary
"Sonar" navigates you if you are blind. It means that you can understand what is around you by emitting sound or reflected sound waves. You can see anything by using sound, and it removes your fear of not being able to see.
As a result, you won't fear blindness but you fear what you can't see when you think about blindness.
Certainly, moving might be difficult and challenging for blind people, but they can use their brain to see. They do not use their eyes.
This is the same when you overcome your difficult challenge and the dark unknown that is your fear. It's just that you are activated through unimagined discoveries. All people still have your part that can be activated more.