21 Dec | a.m

Say: Spirit, mind, soul, and the powers of sight and hearing are but one single reality which hath manifold expressions owing to the diversity of its instruments. As thou dost observe, man's power to comprehend, move, speak, hear, and see all derive from this sign of his Lord within him. It is single in its essence, yet manifold through the diversity of its instruments. This, verily, is a certain truth. For example, if it directeth its attention to the means of hearing, then hearing and its attributes become manifest... In like manner, when this sign of God turneth towards the brain, the head, and such means, the powers of the mind and the soul are manifested. Thy Lord, verily, is potent to do whatsoever He pleaseth.

- Baha'u'llah, The Summons of the Lord of Hosts, p. 154

 … the various organs and members, the parts and elements, that constitute the body of man, though at variance, are yet all connected one with the other by that all-unifying agency known as the human soul, that causeth them to function in perfect harmony and with absolute regularity, thus making the continuation of life possible. The human body, however, is utterly unconscious of that all-unifying agency, and yet acteth with regularity and dischargeth its functions according to its will.

- Abdu'l-Bahá, Baha'i World Faith - Abdu'l-Bahá Section, p. 340