The Spirits' Book
Book Two - The Spirit World
Chapter VIII - Emancipation of the Soul
Spirit Visits of Living Individuals
414. Can two individuals who know each other visit one another in sleep?
“Yes, and many others, who are not aware of their relationship when awake, meet and talk. You may have friends in another country without even knowing it. Visiting friends, relatives, acquaintances, and anyone who can be of use to you in sleep is very common, and you yourselves carry out these visits almost every night.”