And I think if you are outside, whether you are walking or sitting, paying attention as a spiritual practice is really not only seeing, but having all of your senses engaged in what's going on is important.

我想如果你在户外，无论是走，或是坐，作为感受灵性的实践,所谓的注意，并不仅仅是看，而是调动你所有的感官,来感受身边的一切，这才是要点。

普林斯顿公开课 - 人性课程节选

When he talks about the soul being invisible, and invisible things being indestructible, maybe he means things that can't be observed through any of your five senses.

他谈到灵魂是无形的,无形的东西不会毁灭，也许他指的无形是通过五官,都无法觉察到的东西。

耶鲁公开课 - 死亡课程节选