People do brave things not because they are strong, but because the reason is bigger than the fear. A mother will run into fire for her child. A man will start a business because he wants to feed his family.
You cannot be brave without being open to embarrassment, rejection, and heartbreak. If you are not willing to be embarrassed, you can never be truly brave.
Courageous people are scared too. The difference is they feel the fear and still move. Fearless people are not brave, they just don't understand danger.
You are not born with it. You build it by doing small scary things every day — speaking up, saying no, starting something. The more you use it, the stronger it gets.