Paraphrased from someone smarter than me:
You are destined for greatness. You have it inside of you and you know it. You have always known it; felt it thumping in your gut, clawing, scratching, struggling to get free. It needs your help. As long as you hold yourself to the standard of average, that is all you will ever be. In your dreams you aren't average, so why settle for it now? What are you not doing right now that's eating at the back of your skull? Go Do It!
The time to act is now. You will burn. You will feel pain. You will suffer. Your demons will not be defeated easily. Every step of the way they will whisper in your ear that you aren't good enough. That you're not meant to succeed. "just give up. you'll never be the best." they will mutter. "NO!" you will reply. You will embrace the suffering, finish that last rep, claw through the agonizing pain. You will destroy that mediocre pussy in your head. You will break your boundaries. You will rise above the rest. You will realize your potential.
You are not an average man. Now go and do what you are destined to do. End of story.
What are you not doing because you fear failure?