I believe one's personal attitude has everything to do with how people approach adversity in life.
This is not an easy or simplistic concept: attitude is based a great deal on experiences, opportunities, and the support and connection with others, including family, friends and even one's employer or co-workers. It takes many years to develop a clear sense of self. If one is fortunate to have a positive support structure, input from others will assist someone in facing adversity. A strong positive sense of self is essential. For many people, a spiritual connection to a faith or the universe in general, will uplift an individual during difficult times.
However, if alone, isolated or feeling rejected, a person's ability to face adversity in a positive way is nearly impossible. Without feeling connected to others and able to benefit from the strength and objectivity of others, it is very hard to look at life's adversities and survive.