GREATNESS Is Not What You Become, It's What You Overcome
Success=Greatness & Greatness=Success
My definition for success is that the accomplishment you make to overcome the problems and obstacles in your path.
Your achievements can be beyond fantasy
This quote means to me that if you let your self convince your self that your that good enough or even believe me in your self then your not going to achieve the goal or even your dream.
I think what success means is what this quote say, "Try not to become a man of success, but rather try to become a man of value". This means that your success will not mean anything unless you do some wroth value. Which why would you do anything that it not even worth anything to you. If it has no real value to you then its not true success in my eyes but it's just work or extra work that you have you do.