When the channel of the human soul is cleansed of all worldly and impeding attachments, it will unfailingly perceive the breath of the Beloved across immeasurable distances, and will, led by its perfume, attain and enter the City of Certitude.
Therein he will discern the wonders of His ancient Wisdom, and will perceive all the hidden teachings from the rustling leaves of the Tree that flourisheth in that City. With both his inner and outer ear, he will hear from its dust the hymns of glory and praise ascending unto the Lord of Lords, and with his inner eye will he discover the mysteries of "return" and "revival."
How unspeakably glorious are the signs, the tokens, the revelations, and splendors which He, Who is the King of Names and Attributes, hath destined for that City! The attainment unto this City quencheth thirst without water, and kindleth the love of God without fire. Within every blade of grass are enshrined the mysteries of an inscrutable Wisdom, and upon every rose-bush a myriad nightingales pour out, in blissful rapture, their melody. Its wondrous tulips unfold the mystery of the undying Fire in the Burning Bush, and its sweet savors of holiness breathe the perfume of the Messianic Spirit. It bestoweth wealth without gold, and conferreth immortality without death. In each one of its leaves ineffable delights are treasured, and within every chamber unnumbered mysteries lie hidden.
They that valiantly labor in quest of God, will, when once they have renounced all else but Him, be so attached and wedded unto that City, that a moment's separation from it would to them be unthinkable. They will hearken unto infallible proofs from the Hyacinth of that assembly, and will receive the surest testimonies from the beauty of its Rose, and the melody of its Nightingale. Once in about a thousand years shall this City be renewed and readorned....
That City is none other than the Word of God revealed in every age and dispensation.
- Baha'u'llah (Gleanings from the Writings of Baha'u'llah)