No man or woman has achieved an effective personality who is not self-disciplined. Such discipline must not be an end in itself, but must be directed to the development of resolute Christian character.
One of the great lessons I've learned in athletics is that you've got to discipline your life. No matter how good you may be, you've got to be willing to cut out of your life those things that keep you from going to the top.
Discipline must come through liberty. We do not consider an individual disciplined only when he has been rendered as artificially silent as a mute and as immovable as a paralytic. He is an individual annihilated, not disciplined.