Psychological resilience is defined as an individual's ability to successfully adapt to life tasks in the face of social disadvantage or highly adverse conditions.
Adversity and stress can come in the shape of family or relationship problems, health problems, or workplace and financial worries, among others. Resilience is one's ability to bounce back from a negative experience with "competent functioning."
Resilience is not a rare ability; in reality, it is found in the average individual and it can be learned and developed by virtually anyone. Resilience should be considered a process, rather than a trait to be had. It is a process of individuation through a structured system with gradual discovery of personal and unique abilities.

A common misapprehension is that resilient people are free from negative emotions or thoughts, remaining optimistic in most or all situations. To the contrary, resilient individuals have, through time, developed proper coping techniques that allow them to effectively and relatively easily navigate around or through crises. In other words, people who demonstrate resilience are people with optimistic attitude and positive emotionality and are, by practice, able to effectively balance negative emotions with positive ones.

Adapted from Wikipedia, the free encyclopedia. Internet. Accessed on June 14, 2016.