Self-respect is the root of discipline: The sense of dignity grows with the ability to say no to oneself.

-- Abraham Joshua Heschel 1907-1972

"Your ability to discipline yourself to set clear goals, and then to work toward them everyday, will do more to guarantee your success than any other single factor."

Brian Tracy in The Power of Discipline

"Maturity is achieved when a person postpones immediate pleasures for long-term values."

-- Joshua L. Liebman