He later became a Muslim and an opponent of the Baha'i Faith, being considered a Covenant-breaker. He returned to Tehran and spent the rest of his life as a secondary school teacher. During this period he wrote many works of poetry and prose, including Kashf al-Hial, a three volume work refuting the Bahá'í Faith.[1] He was labelled by Shoghi Effendi as a "shameless apostate".[2]