The world DOES NOT challenge only your strengths. How to handle setbacks and failures is essential to not only leadership, lasting success, but also daily problem solving, negotiation, new projects, innovation, etc.
However, many great leaders have stopped achieving since they cannot handle setbacks and failures. Early successors often are crushed much worse because they have not exercised the muscle to be resilient. In addition, setbacks and failures can also cause series of stress-related health issues, such as heart attack. Thus, positive thinking and motivation are not enough.
To empower leaders of tomorrow, we build adversity quotient, starting with children.
Please read part 4.4 of What Stops Leaders from Good to Great? for more details and case studies.