“There are five outward material powers in man which are the means of perception—that is, five powers whereby man perceives material things. They are sight, which perceives sensible forms; hearing, which perceives audible sounds; smell, which perceives odours; taste, which perceives edible things; and touch, which is distributed throughout the body and which perceives tactile realities. These five powers perceive external objects.“

– ‘Abdu’l-Bahá, Some Answered Questions