A disciplined mind leads to happiness, and an undisciplined mind leads to suffering.

Dalai Lama

Laziness is nothing more than the habit of resting before you get tired.

Jules Renard

One can have no smaller or greater mastery than mastery of oneself.

Leonardo da Vinci

A champion doesn't become a champion in the ring, he's merely recognized in the ring. His "becoming" happens during his daily routine.

Joe Louis

He that cannot obey, cannot command.

Benjamin Franklin

A good archer is known not by his arrows but by his aim.

Thomas Fuller