In "Doctrinal Discussion" Dr. Gayle Woods writes...

A self-disciplined person’s actions are rational responses rather than an emotional or impulsive response. He will even at times put aside the possibility of pleasure and comfort in order to do what is most important at the moment.
Our instant gratification, fast-food, fast-paced society wants a quick fix for every problem. The wise understand, however, that to succeed spiritually, you must be more deliberate and take the route of self-discipline.

Discussion: What attitudes must we adopt to take "the route of self-discipline"?
Source: Biblical Family Values, Adult Teacher's Insights, page 32.