 At ages 12 and 24, Mani had visionary experiences of a "heavenly twin" of his, calling him to leave his father's sect and preach the true message of Christ.In 240–41, Mani travelled to the Indo-Greek Kingdom of the Sakhas in modern-day Afghanistan, where he studied Hinduism and its various extant philosophies.Returning in 242, he joined the court of Shapur I, to whom he dedicated his only work written in Persian, known as the "Shabuhragan".