The Spirits' Book
Book Two - The Spirit World
Chapter IV - Multiple Lives
Physical and Moral Likeness
213. Since spirits incarnate as twins due to feelings of sympathy, from where does the hostility that is sometimes felt by twins for one another originate?
“There is no set rule stating that only sympathetic spirits are incarnated as twins. Unsympathetic spirits may have formed this link to try to work out their differences during a new physical life.”