In man five outer powers exist, which are the agents of perception, that is to say, through these five powers man perceives material beings. These are sight, which perceives visible forms; hearing, which perceives audible sounds; smell, which perceives odors; taste, which perceives foods; and feeling, which is in all parts of the body, and perceives tangible things. These five powers perceive outward existences.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 317