When love make us gods
A study appearing in The Journal of Neurophysiology shows that romantic love is a biological urge distinct from sexual arousal. See here. [I am grateful to Miryam Librán for the link].
So love is not a sublimation of sexual urge (as Freud used to think), and is not only a literary convention. It is a physiological affection, provoking a set of symptoms in the "patient". One of these is that love make the lover feel literally like a god. I have written an essay on this (in Spanish): "Cuando el amor nos hace dioses" (When love make us gods).