I thought I heard the Bible Answer Man define that about a decade ago, or so.
The internet is your friend:
the meaning of the word incorporeal
the meaning of the word corporeal
And so I ask you specifically, do you completely "grasp" the meaning of eternity - do you fully "comprehend" all that eternity contains, can you describe the nature and extent of eternity, can you describe, from experience (are you familiar with) the incorporeal and corporeal substance as well as the light of eternity?
And if so, please do