Self-discipline is control over the mind and body. This allows one to restructure his thoughts or beliefs with better information and improve his behavior, essentially overcoming temptation itself.
Self-restraint does not deal with belief and so the temptation remains. Through the power of his own will one fights to resist temptation by choosing not to give in to it. Without reconstruction of the mind he will eventually lose this battle and ultimately be overcome by his temptation.
Self restraint must lead to self-discipline in order for one to be successful.
I choose to resist temptation as a way of finding out how strong my will is. Also if I often feel tempted to lash out at people when they annoy me. Resisting this temptation is the only honorable thing to do.
~ A spoken word is a moment, A written word is eternal ~