The development of poetry in Persia occurred at a time when there was a great conflict between the orthodox and the freethinkers. At that time the law of the nation was a religious law and no one was at liberty to express his free thoughts which might be in conflict with the religious ideas. And there were great thinkers such as Firdausi, Farid-ud-Din-Attar, Jelal-ud-Din Rumi, Sa'di, Hafiz, Jami, Omar Khayyam, who were not only poets, but who were poetry itself. They were living in another world although they appeared to be on earth. Their outlook on life, their keen sight, were different to those of everyone else. The words which arose from their hearts were not brought forth with effort, they were natural flames rising up out of the heart. And these words remain as flames enlightening souls of all times, whatever soul they have touched.