If you want to interview for a job but you're not sure if you're qualified – let them tell you no.
If you want to ask someone out on a date but you're not sure if you're "in their league" – let them tell you no.
If you want to try out for a sports team or a music group but you're not sure if you have the talent – let them tell you no.
It's amazing how often we don't do things in life because we stop ourselves. We're afraid that we're not good enough or don't want to feel rejected if we don't make it. So we don't even try.
When I was debating about applying for a postgraduate scholarship, someone gave me this great perspective: "What's the worst that could happen? They could say 'no,' and you'd be exactly where you are now."
They were right, and thankfully, I ended up getting a scholarship that allowed me to study hip-hop and global youth cultures in England for four years. But without making the attempt, I never would have had the amazing opportunities that I experienced while living abroad.
This is why the idea of "potential" matters. Often we are bad judges of our own potential, and we limit ourselves long before anyone else has a chance to limit us. We have no idea what we're capable of until we try.
What is that thing that you want to do but think you can't? What would you do if you had all the confidence in the world? Go do that thing now. Let them tell you no. And maybe they won't.