“…there are two kinds of birth: the first, physical birth, is from the matrix of the mother; the second, or spiritual birth, is from the world of nature. In both he is without knowledge of the new world of existence he is entering. Therefore, rebirth means his release from the captivity of nature, freedom from attachment to this mortal and material life. This is the second, or spiritual, birth of which Jesus Christ spoke in the Gospels.“

– ‘Abdu’l-Bahá, The Promulgation of Universal Peace