What characteristics essentially define an immaterial soul? I've heard

What characteristics essentially define an immaterial soul? I've heard

What characteristics essentially define an immaterial soul? I've heard philosophers define a soul as being an immaterial substance which possesses a range of mental capacities or dispositions, but they never really define its internal structure. Immateriality is merely a negative attribute, but I am looking for a positive characterization of the soul. Souls have the essential capacity to have consciousness (as souls can be unconscious or conscious), but what intrinsic feature(s) of the soul explains this?

Read another response by Allen Stairs
Read another response about Mind