" The Revelations now began to come more copiously. They were immediately transmitted by the Prophet to those who were with him, then passed from mouth to mouth, memorised and recited - a long and rapidly increasing litany which told of the ephemeral nature of all earthly things, of death and of the certainty of the Resurrection and the Last Judgement, followed by Hell or Paradise. But above all it told of the Glory of God, of His Indivisible Oneness, his Truth, Wisdom, Goodness, Mercy, Bounty and Power; and by extension it continually referred to His Signs, the marvels of nature, and to their harmonious working together which testified so eloquently to the Oneness of their Sole Originator. Harmony is the imprint of Oneness upon multiplicity, and the Koran draws attention to that harmony as a theme for man’s meditation. "

― , Muhammad: His Life Based on the Earliest Sources