I want to retire being the best pound-for-pound fighter that ever lived. It's very hard to say how to judge it, but when I think myself that I'm the best it will be the time to do something else in my life.
Don't live life as a spectator. Always examine life: Espouse new ideas, long for new things, constantly discovering new interests, escaping from boring routines. Engage life with enthusiasm; grasping life aggressively and squeezing from it every drop of excitement, satisfaction, and joy. The key to unleashing life's potential is attitude. The person who approaches life with a child-like wonder is best prepared to defy the limitations of time, is more alive, more of a participant in life than the person who remains a spectator.