The Writings of Baha'u'llah are most comprehensive.. dealing with every phase of human life, individual and social, with things material and things spiritual, with the interpretations of ancient scriptures, and with prophetic anticipations of both near and distant future (48:2)

The range and accuracy of His knowledge was amazing, He could quote and expound the Scriptures of the various religions with which His correspondents or questioners were familiar, in a convincing and authoritative manner, although apparently had never had the ordinary means of access to many of the books referred to.. The well-known circumstances of His long imprisonment render it impossible to doubt that the wealth of knowledge shown in His Writings must have been acquired from some spiritual source, quite independent of the usual means of study. (48:3)

Sometimes He wrote in modern Persian, the ordinary language of His fellow countrymen.. At other times, as when addressing learned Zoroastrians, He wrote in the purest classical Persian.. also.. in Arabic, sometimes in very simple language, sometimes in classical style.. remarkable because of His entire lack of literary education (49:1)

In some of His Writings the way of holiness is pointed out in.. simple terms.. In others there is a wealth of poetic imagery, profound philosophy and allusions to.. other scriptures.. or to.. 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.. to be understood only by those who have already passed through the earlier stages. (49:2)

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Baha'u'llah & the New Era
J. Esslemont