You cannot continue to succeed in the world or have a fulfilling life in the world unless you choose to use your life in the service somehow to others and give back what you have been given. That's how you keep it. That's how you get it. That's how you grow it.
I was in the gym working on my triceps, and I was thinking, just as I did the 50-pound pulldown, I am going to be in better shape by the end of the year [2016] than I've ever been in my life. I really just smiled at the notion: Wow, what a thing.
What I know for sure is that what you give comes back to you. That's not just my theory or point of view, it's physics. Life is an energy of giving and receiving... Those that are greedy, hit a road block where they are alone. Give more than you receive and be grateful for those around you.
I think mentors are important and I don't think anybody makes it in the world without some form of mentorship. Nobody makes it alone. Nobody has made it alone. And we are all mentors to people even when we don't know it.