The concept of inflation suggests that the universe underwent a period of extremely rapid expansion shortly after the Big Bang.
The best decisions are made with both data and intuition.
忠于自己,永远不要让任何人告诉你你做不到某件事。
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.