During the 1950s Fethullah Gülen completed his religious education and training under various prominent scholars and Sufi masters leading to the traditional Islamic ijaza (license to teach). This education was provided almost entirely within an informal system, tacitly ignored and unsupported by the state and running parallel to its education system. At the same time, Fethullah Gülen pursued and completed his secondary level secular education through external exams. In the late fifties, he came across compilations of the scholarly work Risale-i Nur (Epistles of Light) by Said Nursi but never met its famous author.
After passing an exam administered by the Turkish State’s Directorate of Religious Affairs (Diyanet Isleri Baskanligi) in 1958, he was awarded a state preacher license and began to preach and teach in Edirne, a province on the European part of the country. In this period of his youth, he had the opportunity to deepen his knowledge in the Islamic tradition, informally study social and natural sciences, and examine the classics of both Eastern and Western philosophy and literature. Among the historic figures who had the most impact on his intellectual life we can mention Abu Hanifa, Ghazali, Imam Rabbani, Rumi,