As the babe is born into the light of this physical world, so must the physical and intellectual man be born into the light of the world of Divinity. In the matrix of the mother the unborn child was deprived and unconscious of the world of material existence, but after its birth it beheld the wonders and beauties of a new realm of life and being. In the world of the matrix it was utterly ignorant and unable to conceive of these new conditions, but after its transformation it discovers the radiant sun, trees, flowers and an infinite range of blessings and bounties awaiting it. In the human plane and kingdom man is a captive of nature and ignorant of the divine world until born of the breaths of the Holy Spirit out of physical conditions of limitation and deprivation. Then he beholds the reality of the spiritual realm and Kingdom, realizes the narrow restrictions of the mere human world of existence and becomes conscious of the unlimited and infinite glories of the world of God.
(‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 288-289)
But if he possesses the knowledge of God, becomes ignited through the fire of the love of God, witnesses the great and mighty signs of the Kingdom, becomes the cause of love among mankind and lives in the utmost state of sanctity and holiness, he shall surely attain to second birth, be baptized by the Holy Spirit and enjoy everlasting existence.
(‘Abdu’l-Bahá, Promulgation of Universal Peace, p. 226)
The rewards of this life are the virtues and perfections which adorn the reality of man. For example, he was dark and becomes luminous, he was ignorant and becomes wise, he was neglectful and becomes vigilant, he was asleep and becomes awakened, he was dead and becomes living, he was blind and becomes a seer, he was deaf and becomes a hearer, he was earthly and becomes heavenly, he was material and becomes spiritual. Through these rewards he gains spiritual birth, and becomes a new creature. He becomes the manifestation of the verse in the Gospel where it is said of the disciples that they were born not of blood, nor of the will of the flesh, nor of the will of man, but of God; that is to say, they were delivered from the animal characteristics and qualities which are the characteristics of human nature, and they became qualified with the divine characteristics, which are the bounty of God; this is the meaning of the second birth. For such people there is no greater torture than being veiled from God, and no more severe punishment than sensual vices, dark qualities, lowness of nature, engrossment in carnal desires. When they are delivered through the light of faith from the darkness of these vices, and become illuminated with the radiance of the Sun of Reality, and ennobled with all the virtues, they esteem this the greatest reward, and they know it to be the true paradise. In the same way they consider that the spiritual punishment, that is to say the torture and punishment of existence, is to be subjected to the world of nature, to be veiled from God, to be brutal and ignorant, to fall into carnal lusts, to be absorbed in animal frailties; to be characterized with dark qualities, such as falsehood, tyranny, cruelty, attachment to the affairs of the world, and being immersed in satanic ideas; for them, these are the greatest punishments and tortures.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 323)