The Spirits' Book
Book Two - The Spirit World
Chapter VII - Return to Physical Life
Influence of the Body
369. Is the free exercise of a spirit’s faculties secondary to the development of its physical organs during incarnation?
“Those organs serve as the soul’s channels for manifesting its faculties. By default, this manifestation is secondary to the degree of development and perfection of those organs, as the perfection of manual work depends on the quality of the tool used.”