The Spirits' Book
Book Two - The Spirit World
Chapter IX - Intervention of Spirits on the Physical World
Guardian Angels: Protective, Familiar and Sympathetic Spirits
510. When parents who watch over their child reincarnate, do they continue to watch over them?
“This task becomes more difficult, but while free, parents may ask a like-minded spirit to assist them in accomplishing it. However, spirits do not undertake missions that they cannot see through to the end.”
“An incarnate spirit, especially in heavily material worlds, is debilitated by its body and cannot devote itself entirely to another. For this reason, those who are not elevated enough to serve as guardian angels are assisted by higher spirits, so that if the help of one spirit should fail, its place is filled by another.”