The method of psychology must be as exact as that of the physical sciences.

My parents are my backbone. Still are. They’re the only group that will support you if you score zero or you score 40..

Every decision we make today in aquaculture will echo through the marine ecosystems of tomorrow.

Every ton of low-carbon cement we produce is a step toward a healthier planet.

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.