心理学家必须研究心灵的实际状态，而非理想状态。
The psychologist must study the mind as it is, not as it ought to be.
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.
创造真正繁荣的唯一途径是给予人们创新和创造价值的自由。
What appears good to one may appear evil to another， and vice versa.
如果你不能，你必须。如果你必须，你就能。