Simplify the following text for a Grade 7 native English-speaking person.
Original: Manichaeism ( ; in Modern Persian Ä yin e MÄ ni ; ) was one of the major Iranian Gnostic religions , originating in Sassanid Persia .
Simplified: Manichaeism ( in Modern Persian Ä yin e MÄ ni ) was one of the major Iranian Gnostic religions . Originally it came from Sassanid Persia .