The Spirits' Book
Book Two - The Spirit World
Chapter IX - Intervention of Spirits on the Physical World
Affection of Spirits for Certain Individuals
484. Do spirits affectionately prefer certain individuals?
“Good spirits sympathize with all good men and women, or those who are capable of betterment. Lower order spirits sympathize with those who are bad, or who may become such. In either case, the bond is a consequence of the similarity of thoughts and ideas.”