Adversity

The experienced mountain climber is not intimidated by a mountain -- he is inspired by it. The persistent winner is not discouraged by a problem -- he is challenged by it. Mountains are created to be conquered; adversities are designed to be defeated; problems are sent to be solved. It is better to master one mountain than a thousand foothills. - William Arthur Ward

Adversity is a fact of life. It can't be controlled. What we can control is how we react to it.