Scars have the strange power to remind us that our past is real.
伤疤有一种奇怪的力量，能提醒我们过去是真实的。
"Sometimes the hardest stories to write are the ones closest to your heart."
最大的谜团是我们自己创造的谜团。
只有掌握核心技术，才能立于不败之地。
没有人的存在，我的建筑是不完整的。
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.