Why isn't sight like touch, diffused through all parts of the body "that she might look at will through every pore?"

为什么视力不能像触觉那样遍布人体各个部位,那样“她就能看到身体的每个毛孔“

耶鲁公开课 - 弥尔顿课程节选

As I begin trying to touch my body, I don't feel anything.

我又试图触碰我的身体,没有任何感觉

耶鲁公开课 - 死亡课程节选