Let's just notice that there's a difference between saying can't be seen through the eyes and can't be observed through one sense or the other.

我们只需注意到,说眼睛看不到,和不能通过感官感知到,这两者是有区别的。

耶鲁公开课 - 死亡课程节选

So even if we grant that what Socrates meant by invisible was can not be observed, we still have to say with Simmias , you know, fourth is just not true.

所以即使我们认同苏格拉底,指的无形是不能被感知，我们仍旧站在西米亚斯这边，第四点是不正确的。

耶鲁公开课 - 死亡课程节选