Water and sanitation has not had the same kind of champion that global health, and even education, have had.

No matter how good you think you are as a leader, my goodness, the people around you will have all kinds of ideas for how you can get better. So for me, the most fundamental thing about leadership is to have the humility to continue to get feedback and to try to get better - because your job is to try to help everybody else get better.

One of the most important things about leadership is that you have to have the kind of humility that will allow you to be coached.

One of the lessons of leadership worth emphasizing is that you want to get to know other great leaders and take their advice. At some point in your development, it's only people who've been in the seat of having to be leaders who can help you in a deep way.

Growing economies are critical; we will never be able to end poverty unless economies are growing. We also need to find ways of growing economies so that the growth creates good jobs, especially for young people, especially for women, especially for the poorest who have been excluded from the economic system.