At other times, as when addressing learned Zoroastrians, He wrote in the purest classical Persian.
He also wrote with equal fluency in Arabic, sometimes in very simple language, sometimes in classical style somewhat similar to that of the Qur'an.

His perfect mastery of these different languages and styles was remarkable because of His entire lack of literary education.
In some of His Writings the way of holiness is pointed out in such simple terms that "the wayfaring men, though fools, shall not err therein" (Isaiah xxv, 8).

In others there is a wealth of poetic imagery, profound philosophy and allusions to Muhammadan, Zoroastrian and other scriptures, or to Persian and Arabic literature and legends, such as only the poet, the philosopher or the scholar can adequately appreciate.

Still others deal with advanced stages of the spiritual life and are to be understood only by those who have already passed through the earlier stages.

His works are like a bountiful table provided with foods and delicacies suited to the needs and tastes of all who are genuine truth seekers.
It is because of this that His Cause had effect among the learned and culture, spiritual poets and well-known writers.