Discipline serves a critical role in a personโ€™s life. It takes a great deal of mental strength to resist the temptations of instant gratification these days. Being told โ€œnoโ€ by oneโ€™s parents is the foundation to this trait. Without this, a person may not be able to exercise a filter against using violence to solve problems. It helps to be able to see delayed gratification as a higher reward. Itโ€™s the idea of โ€œwork hard now, get the reward laterโ€ as opposed to โ€œget the reward now, work laterโ€. Itโ€™s the ability to compose oneself during intense emotional stress.