The sensational Sufi movements which took place in Persia in the later periods, have won all the credit of Sufism for the Persians, and Sufism came to be regarded as a Persian philosophy. Imam al-Ghazali, Juneyd-e Baghdadi, Farid-ud-Din Attar had taken the lead in advancing Sufism in the world at large. Shams-i-Tabriz, Sa'di, Khagani, Firdausi, Omar Khayyam, Abdul Ala and other great Sufi poets, have very substantially established the reputation of Sufism by their inspired poetical works on divine wisdom. Sa'adi's works (Gulistan and Bostan) illuminate the intellect; the Divan of Hafiz expands the heart with divine love; Jelal-ud-Din Rumi's poems, the Masnavi e Ma'navi inspire the soul.