If there is something you want to do, that's a good thing. But people are going to try and stop you from being able to do it. They're going to tell you that you are not good enough, smart enough, get hurt, kill you if you try and go out there to do that. You must be fearless. When you stand in front of something, your heart is going to beat a little bit. Your heart is definitely going to beat but you can't get paralyzed, don't get struck by that fear. Take that step fearless towards what you want. 

Relentless means that you absolutely, positively, will not stop until you achieve that thing that you want. You must be relentless. People are going to talk about you, people are going to beat on you, try and stop you, and the world is going to be heavy on you. But when you want something, and you dream about something, DO NOT STOP no matter what. Do not stop going towards that thing that you want. 

and the quote to live by:
"every passing moment, you have another chance to turn it all around. And that's with anything you want to do in life."