To enjoy good health, to bring true happiness to one's family, to bring peace to all, one must first discipline and control one's own mind. If a man can control his mind he can find the way to Enlightenment, and all wisdom and virtue will naturally come to him.
Buddha

The discipline you learn and character you build from setting and achieving a goal can be more valuable than the achievement of the goal itself.
Bo Bennett

Talent without discipline is like an octopus on roller skates. There's plenty of movement, but you never know if it's going to be forward, backwards, or sideways.
H. Jackson Brown, Jr.

In the United States, we spend millions of dollars on sports because it promotes teamwork, discipline, and the experience of learning to make great progress in small increments. Learning to play music does all this and more.
Linda Ronstadt

If we do not discipline ourselves the world will do it for us.
William Feather

Because of their size, parents may be difficult to discipline properly.
P. J. O'Rourke