I'm convinced that attitude is one of the biggest factors on our level of success and happiness. The same event could happen to two people, yet they would 'see' it differently based on their lens, which is made up on their view of the world.
Negative. Positive. Victim. Victor. Strength. Weakness. Love. Indifference.
All depends on the attitude.
Thus, life becomes 10% what happens to me and 90% how I react to it.