The human spirit may be likened to the bounty of the sun shining on a mirror. The body of man, … grows and develops through the animal spirit.
Abdu’l-Bahá
Wherefore the brain must
Wherefore the brain must be looked upon as the universal and general sensory and at the same time as the universal and general motory organ of the body and finally as the universal and general laboratory of the animal spirits and the blood or of the essential juices of life. Emanuel Swedenborg