You’re thinking of ‘immortality’ as the “forever- continuing-in-existence” of the “matter mortal”.
Hmm, perhaps a bit of cross purposes...or understandings. Thread drift but... when I think “immortal” I consider only the eternal soul which animates the physical body.
I guess crazed and evil lunatics might try to make the earthly body live forever; of course failing miserably.
Back to the regularly scheduled thread...