" research indicates that anger negatively correlates with resilience. A fascinating and broadly cited study published in 2003 sought to determine what role positive emotions (such as hopefulness or gratitude) had in a crisis. The researchers chose the attacks on September 11, 2001, as the crisis event. What they found was astonishing. Not only did positive emotions have a positive correlation with resilience; negative emotions clearly indicated a poor outcome. Anger (especially ongoing, continual anger) was the number one indicator that a person would not be able to resume functioning as he had before the crisis. Fuming in anger, apparently, doesn’t enable us to bounce back very well.10 "

― Daniel D. Maurer , Endure: The Power of Spiritual Assets for Resilience to Trauma & Stress