Board Thread:Warhammer 40k General Discussion/@comment-108.20.7.134-20131202042330/@comment-74.128.152.190-20131230234456

Neithan02 wrote: no memories and no experience means that you do not have manus in mind, only in physical state

If the person's psychic signature (soul) is placed within a vessel they retain their memories and experiences, which is why a powerful psyker is needed to truly kill someone as strong as Abaddon.

The vessel is irrelevant unless it cannot contain the soul.