"Development and progression imply gradual stages or degrees... now is the beginning of the manifestation of the power spiritual, and inevitably its potency of life forces will assume greater and greater proportions... It will reach such a degree that spiritual effulgences will overcome the physical, so that divine susceptibilities will overpower material intelligence, and the heavenly light dispel and banish earthly darkness." (Pup 127) "There is a day and a night in the world of spirituality." Promulgation of Universal Peace Page 265 . (93:2)

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The Worlds of God
U.S.Baha'i National Ref Library Committee