所有老人共同的大秘密是，在七八十年里，你其实并没有改变。你的身体变了，但你一点都没变。
The human body is first and foremost a mirror to the soul and the most powerful way to express emotions.
当九月结束时叫醒我。
I'm not a role model. Just because I can rap doesn't mean I'm a role model.
A mathematician is a maker of patterns, like a painter or a poet.
The most effective way to promote democracy is not through military intervention but through the slow and steady process of building institutions and promoting economic development.
The poor face constraints that are often invisible to policymakers.
