Last night I tripped over the same insight in a different context: reading the thirteenth century Sufi mystic poet Rumi -- who like many mystics, joyfully extended the tradition of the Song of Songs to cast the relationship between the human soul and God as an erotic one. Behold:
The Only Teaching
For lovers, the only teaching is the beauty of the Beloved;
their only book and lecture is the Face.
Outwardly they are silent,
but their penetrating remembrance rises
to the high throne of their Friend.
Their only lesson is enthusiasm, whirling, and trembling,
not the minor details of law.
Mathnawi III, 3847-3819
translated by Kahir Helminski and Camille Helminski
Enthusiasm literally means to be possessed by a god, though I don't know whether the etymology holds in the original Persian. "Whirling" is the ecstatic dancing of the "whirling dervishes," which Rumi pioneered.