But they can never engage in those efforts, if we do not do the job that I am confident we will do tomorrow morning at 7:00 AM on Christmas Eve, and that is to renew the American dream, and revive our middle class, and rebuild the foundation upon which future generations will stand.

VOA: standard.2009.12.24

I hope that you've been inspired to get out there and engage your local community, people from across religious backgrounds.

我希望你受到了激励，立即行动,参与到当地的社区中，与有着不同宗教背景的人融合。

普林斯顿公开课 - 人性课程节选

I felt at the very moment I attained my majority I should engage in public affairs.

当时我觉得和大部份的人一样,我应该积极参与公共事务。

耶鲁公开课 - 政治哲学导论课程节选