Discipline serves a critical role in a personโs life. It takes a great deal of mental strength to resist the temptations of instant gratification these days. Being told โnoโ by oneโs 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. Itโs the idea of โwork hard now, get the reward laterโ as opposed to โget the reward now, work laterโ. Itโs the ability to compose oneself during intense emotional stress.