The body is in “harmony with the spirit” and “under its influence”

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

Fifth, no effect occurs without a cause. It is impossible for a cause to be non-existent when its light and radiance are manifest, for fire not to exist when its heat is sensed, for light not to exist when illumined objects are witnessed, mind not to exist when the power of thought is present. Briefly, there can be no effect without a cause, for as long as there is an effect there must be a cause. Therefore, though Christ appeared one thousand nine hundred and twelve years ago, His signs still exist today and His sovereignty and influence are manifest. Is it possible for that divine Spirit to be non-existent and these great signs still to be present? Therefore it is established that the Cause of these signs is He Who is the source of eternal light and everlasting bounties.