Toward the end of his life while he was still 100% lucid, it was more difficult for him to be mobile and to go into organizations.

在他生命的最后当他头脑还百分百清醒时，活动和参加组织活动对他来说更加困难了。

哈佛公开课 - 幸福课课程节选

There has never been a regime in history that was so single-mindedly devoted to the end of producing that rarest and most difficult species of humanity called simply philosopher.

历史上从没有一个政体,会如此专一地致力于,催生最稀有,最难得的人类物种,即哲学家。

耶鲁公开课 - 政治哲学导论课程节选