Angels and spirits, or in other words, human beings after death, can meet anyone they want—anyone they had known in the world or heard of—when the Lord grants it. They can see such people in person and talk with them, and what is amazing, the person desired appears instantly, face to face. So it is possible to converse not only with friends (and friends usually find each other) but also with other people one had admired and revered.
The Lord in his divine mercy has given me the opportunity to talk not only to people I knew when they were alive in the body but also with leading figures in the Word; likewise with people from the earliest church—the one called Humankind, or Adam—and with some adherents of later churches too. The purpose was to show me that the personal names in the early chapters of Genesis only mean different religions and to teach me what people in the churches of that era were like.
from Secrets of Heaven, Volume 2, Section 1114