According to Meher Baba, a mast is one who is entranced or spellbound by internal spiritual experiences and ecstasies, who cannot function outwardly in an ordinary way, and may appear mad to a casual outside observer.[1] Such experiences, according to Meher Baba, stem from the station of a mast's consciousness (his or her state of consciousness) on inner planes of involution. In The Wayfarers: Meher Baba With the God-Intoxicated, British medical doctor William Donkin documents at length Meher Baba's contacts with masts throughout South Asia (primarily Iran, India, and Pakistan). The introduction, written by Meher Baba, explains their unique state and their outward characteristics.