I value self-discipline, but creating systems that make it next to impossible to misbehave is more reliable than self-control.

Discipline and concentration are a matter of being interested.

Trophies should go to the winners. Self-esteem does not lead to success in life. Self-discipline and self-control do, and sports can help teach those.

Self-control is the chief element in self-respect, and self-respect is the chief element in courage.

Jack Kennedy protected a mature and presidential image – tough, yet not unduly combative.

If you have control over yourself, you have no desire to control others.