If you have a white wall, that's when we did Zen meditation, it's easier if you're just facing a wall.

如果家中有面空墙，我们可以进行坐禅，面对空墙会相对容易。

普林斯顿公开课 - 人性课程节选

At the beginning of the dialogue when Polemarchus brought his friends back to the house, Cephalus we see the aged father, Cephalus.

在对话的开头,当，Polemarchus，领着他的友人,回到家中，我们看到其年迈的父亲。

耶鲁公开课 - 政治哲学导论课程节选