Isis has always been a godddess connected deeply with dreams and the interpretation of dreams. Initiations in ancient temples of Isis took place through a dream as conveyed in Apulius' "Golden Ass".
More details to come on this page about Isis, Goddess of Dreams.
Above picture is Osiris, consort of Isis, who communicates with Isis through dreams. (With Anpu & Heru) Tomb of Horemheb