You, as a human being, are the greatest of all creations.  All limitations that exist, exist only in your mind, nowhere else.  It is only in challenging yourself that you grow in confidence and, in turn, discover what you are capable of.

In this video, Mahatria gives you the only 2 ways by which you can build confidence. 

Challenge yourself.  Challenge your limits.  That's when you will know how good you are.  And that is how you will discover what you're capable of!