The key to success is to keep pushing yourself.
The essence of education means: one tree shakes another, one cloud pushes another, one soul awakens another.
The biggest challenge is to be yourself in a world that is trying to make you like everyone else.
And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.