"That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto thee, ye must be born again.”

"Say: O people! The Tree of Life hath verily been planted in the heart of the heavenly paradise and bestoweth life in every direction. How can ye fail to perceive and recognize it? It will in truth aid thee to grasp all that this well-assured Soul hath disclosed unto thee of the essence of the divine mysteries. The Dove of holiness warbleth in the heaven of immortality and admonisheth thee to array thyself with a new vesture, wrought of steel to shield thee from the shafts of doubt concealed in the allusions of men, saying: “Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto thee, ye must be born again.” 21"

-Bahá'u'lláh, Gems of Divine Mysteries (Javáhiru’l-Asrár), pp. 51-52 

 21. John 3:5–7.

 Nasir al-Mulk, Shiraz, Iran