enough acid and anyone can be made of pure energy
moving right along, since relativity tells us that energy and mass are interchangable, we already are beings of pure energy, sort of.
i'm going to respond scientifically. i have no interest in another religious debate about who's right and who's wrong. so ahead of time, to all those religious persons who have differing points of view, i just want to say i respect them.
nevertheless, many scientists view the conscious mind as a result of the brain's attempt to integrate multiple coded lines of processing about the external world. therefore a mind cannot exist without senses.
if the senses belong to the realm of body, then i don't think it's possible to exist as a mind without a body, whatever they're both made of. the mind is not a command center or cockpit; it's an integral part of the body, and the body is an integral part of the mind. mind and body are one, but i don't see any a priori reason why a mind-body can't be made of energy.
the body of course is subject to change. i think a body made of "pure energy" (which in some models of physics is still massive), could have a mind. but barring divine intervention, i don't think human beings could evolve or turn into that, not naturally anyway. it's certainly possible, but evolution can only use what it already has available. i don't see how the traits of 'physical formlessness' could be carried by genes with a phsyical form, except perhaps as a part of developmental physiology, but that means new people would have to be born in material bodies and eventually 'shed' them (presumably only after they'd reproduced, but who knows, unless we also become immortal and don't need to reporduce to ensure survival any longer).