I want to leave my daughter, and my grandchildren I hope to have and all these young people, a better world. And I think the reason you should do things for other people at bottom is selfish. There is no real difference between selfish and selfless if you understand how the world works. We all tied together. [...] Everytime you cut off somebody else's opportunity you shrink your own horizon.

Bill Clinton on why he helps other people., August 2013