"I am a Vietnam veteran myself,". "I am certainly aware of the criticality of support of the American people for this war and in fact any war.

VOA: standard.2009.08.23

5 years from now I certainly hope to be happier than I am today.

5年后我当然希望自己能比今天幸福。

哈佛公开课 - 幸福课课程节选

Men of Athens," he says, "I will obey the god rather than you and as long as I breathe and am able to do so, " I will certainly not stop philosophizing."

他说：，“雅典人，我只会服从神而非你们,只要我还有口气在，我就绝不会停止哲思“

耶鲁公开课 - 政治哲学导论课程节选