Depending on the level of ability possessed by the medium, this
ectoplasm will very often continue to develop until it becomes
independent from the medium forming its own intelligence. This
intelligence, however, does not originate from the medium's mind. It
is controlled by the intelligence of etheric (deceased) individuals who
use this substance to clothe their etheric bodies during
materialisation experiments. This allows them to be seen, touched and
heard in our physical world by all those present.