Roscher (Nektar and Ambrosia, 1883; see also his article in Roscher's Lexikon der Mythologic) nectar and ambrosia were originally only different forms of the same substance - honey, regarded as a dew, like manna, fallen from heaven, which was used both as food and drink.
To appreciate it, we must distinguish the lower mythologic aspect of him, in which he appears as an amorous and capricious deity lacking often in dignity and real power, and the higher religious aspect, in which he is conceived as the All-Father, the Father of Gods and men in a spiritual or moral sense, as a God omnipotent in heaven and earth, the sea and the realms below, as a God of righteousness and justice and mercy, who regards the sanctity of the oath and hears the voice of the suppliant and sinner, and in whom the pious and the lowly trust.
Another source is mythologic fancy, which, in answer to childlike questions; "Who made the world?"