The “changes experienced by the body do not affect the soul.”

Excerpt from a Talk by ‘Abdu’l-Bahá
Residence of Mr. and Mrs. Parsons

Second, the transference of the body from one condition to another brings about no change or alteration in the soul. For instance, the body is young but it grows old, while the soul remains unaffected; the body becomes weak but the soul does not; the body becomes diseased or paralyzed but the soul remains unchanged. It has often come to pass that one of the limbs of the body has been amputated; the soul, however, remains the same and is not affected at all. Therefore, it is clear that the changes experienced by the body do not affect the soul. As long as it is unchanged, it will remain eternal. The pivot of mortality is change and alteration.