Given the body appears to I 
Given the body disappears while I remains (such as in deep sleep, anesthesia or between two bodily sensations)
Then the body and I are not on equal footing.

Given, whenever the body appears, it appears at zero distance from I (the knowingness of the appearance), they are therefore not two.

Although they are not two, I is eternal and the body is not.
Although not two, I is infinite, formless and the body is not.

A good metaphor is your night dreams. Whatever appears in your night dreams is intimately yourself, bout you (the dreamer) are not your dreams. They are your dreams, and you define them, but they do not define you.

The body is a dream form that the formless I appears as. In recognizing the body as your manifestation, you may free yourself from the belief and feeling that you are the body and recognize your true nature, formless, eternal and infinite. 
Universal sat/Chit/Ananda

Question: “I wonder if you would admit that ultimately body-mind is in no way separate from consciousness. As a practice model, this distinction between Eternal and arising/passing away has a lot of value. But here in this venue we often talk from a beyond practice point of view. Does this make sense?”
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Reply: Using the dream metaphor, your question can translate as such: Would we admit that ultimately your night dreams are in no way separate from you, their dreamer?

In truth, there is no such thing as separation. Your dreams are not separate from you.
Ultimately, the pink flying elephant of your dreams, and the blue Unicorn that you imagine yourself to be, are in no way separate from you the dreamer. 

Yet, it must be said that I have never been a blue unicorn and will never be one.

Question: “do you personally feel a need to set up a distinction between that which arises and disappears and the Consciousness without which they could never be?”
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Reply: At some point, there is a self knowingness that is no longer shaken by world body mind events. The experience of arising/disappearing is replaced by non arising/non disappearing… If that makes sense. 

Which in no way bypasses the pedagogical need to set up distinction between the illusory and the real. This is referred to as the teaching of Viveka.