"And I long for the day when that modifier can be a moot point, but I'm ever grateful if I can inspire some young intrepid tenacious male or female filmmaker, and have them feel that the impossible is possible.

VOA: standard.2010.03.08

But not seeing how it's possible is not the same thing as seeing that it's impossible.

但现阶段无法预见其可能,并不代表永远不可能

耶鲁公开课 - 死亡课程节选

Egypt being the best example, so that no longer was war possible, but the flip side of that is, there was also another thing that was impossible -- freedom.

埃及就是最好的例证,所以当和平年代到来时,其对立面必然显现,即总有另一件事物,变得难以实现,那就是自由

耶鲁公开课 - 古希腊历史简介课程节选