At the mere age of eighteen, Khamenei began studying at the highest level of jurisprudence and its principles under great Islamic scholars like the late Grand Ayatullah Milani in Mashhad. In 1957, he moved to Najaf to pursue further religious studies. His experience convinced him to remain in the Islamic seminary of Najaf, however, his father did not approve and thus he returned to Iran. From 1958 until 1964, Khamenei continued his higher studies in jurisprudence, and philosophy in the Islamic seminary of Qom. There he enjoyed the mentorship of Grand Ayatullah Burujerdi, Imam Khumayni and Allama Tabataba’i. In 1964, he became aware that his father had become blind in one eye. Despite his love for study and research, Khamenei decided to go back to Mashhad and take care of his father. Remembering this event he says, “When I returned to Mashhad Allah blessed me as I took care of my affairs. If I have been successful in life, I believe that it all stems from this good deed that I did for my father; indeed, for both my father and mother.