The Spirits' Book
Book Two - The Spirit World
Chapter II - Incarnation of Spirits
146. Does the soul have a fixed center in the body?
“No, but it is said to reside in the head among people of great intellect and prolific thinkers, while it is said to reside in the heart of people who are sentimental and possessive of a more humanitarian nature.”
a) What should we think of the opinion that the soul in some vital center?
“That is to say that the spirit may reside in this spot in your body because it is where all sensations meet. However, those who place it in what they consider the center of vitality mistake it for the vital fluid or principle. In any case, the soul has a stronger presence in organs that are moral and intellectual indicators.”