His paternal ancestors were generally from the clerical family, and his maternal grandfather, Sheikh Mohammad Kehrizi, was one of the famous scholars of that time.
Ayatollah Saini started his early education in Zanjan city by attending the new schools of that time and after completing the elementary school he entered the high school and at this time he continued his education in the school and the synagogue. He managed to learn sciences such as Arabic literature, logic, jurisprudence, principles, etc. in a short time with the help of his father and other Zanjan seminary professors. He also learned philosophy and jurisprudence there.
Ayatollah Saini entered the seminary of Qom in 1329 on the order of his father to continue his studies. Preparations were made for young Bitoteh Saini in Hojjatiyeh school, but his youth and failure to meet the conditions for staying in the school caused this stay to start with a delay of one year, i.e. in the second half of 1330. He spent that one year in a rented house located on Tehran street. After entering the Hojjatiye school and staying in the 116th room of this school, he devoted nearly fifteen years of his life to studying, teaching and studying in the seminary.
Ayatollah Saini learned his high levels of education from the famous seminary professors. First of all, he studied the letters and merits of Sheikh Ansari and the basic lessons of Akhund with Ayatollah Mujahidi, the lessons of foreign law and jurisprudence and principles with Ayatollah Soltani and Sheikh Abdul Javad Esfahani, the second volume of the lessons of foreign lessons with Ayatollah Khomeini and the main lessons of foreign lessons with Ayatollah Mohaghig Damad, who He learned from the famous teachers of the seminary. In addition to that, he also participated in Ayatollah Boroujerdi's foreign course for a while, and learned mathematics from Sheikh Muhammad Ali Ardabili and Safar Nafs Asfar from Seyyed Abul Hassan Qazvini.
He participated in a course outside Urwa that Allameh Tabataba'i taught privately with a limited number of students at home, and he participated in Darayah, Behelat, Astronomy, the main intellectual sciences, the healing theology system, a complete course of Asfar, and in theoretical mysticism, Foss al-Hakm. Mohi al-Din read Arabic and Misbah al-Alans Ibn Fanari in the presence of Allameh Tabatabai.In practical mysticism, he was a student of Allameh Tabatabai and his brother Seyyed Hassan Elahi. Also, meetings were held in Allameh Tabatabai's house, which were about philosophical and religious issues, and Ayatollah Saini was responsible for managing them in terms of timing, and the results of those meetings were the books of the Realism Method and the book Badaeh al-Hikma and Nahayeh al-Hikma, by Allameh Tabatabai. He also started teaching in Qom, and the first meeting of the Qom teachers' community was held in his room. Ayatollah Saini also had studies in Gharibiyah sciences and benefited from the experts in Zanjan and Qom.
Return to Zanjan
Ayatollah Saini settled in Zanjan in 1344 at the request of the people of Zanjan and Ayatollah Milani's fatwa regarding staying in Zanjan against his will, and Ayatollah Khomeini, Allameh Tabatabai and Ayatollah Mohaghegh Damad stayed in Zanjan. During this period, he taught several complete courses of interpretation, jurisprudence, usul, a course of Nahj al-Balagha and a course of Tawheed Saduq. Ayatollah Saini died on July 15, 1377 in Zanjan city. Among his works, the book of Divine Love, which is about reaching God and severing worldly interests, as well as the description of Kamil's prayer in 40 parts, was published in Bahar Zanjan newspaper.