Whether it is happiness or unhappiness, pain or pleasure, agony or ecstasy, essentially it happens from within.  

Only when your activity is exuberant, will you keep crossing limits. Sports is exuberant activity, so crossing limits becomes natural.

Whatever you do, it is the way you do it that transforms you.

Life is fluid, ever evolving. The more dynamic you are, the more happens in your life, all the time.

If you do not come out of your shell, you are just a nut.