Success is not final, failure is not fatal: It is the courage to continue that counts.

These young guys are playing checkers. I’m out there playing chess.

挑战在于让不可见的东西变得可见。

不要让任何人告诉你你做不到。证明他们是错的。

我不是为死去的总统说唱；我宁愿看到总统死去。