Cherubim being mentioned by R. in his last letter to his Publisher (TT, 21), these lines from Schiller's Ode an die Freude seem relevent:

Wollust ward dem Wurm gegeben,

Und der Cherub steht vor Gott.

Voluptuousness was given to the worm,

and the cherub stands before God.

Also,

Wir betreten feuertrunken, Himmlische, dein Heiligtum.	,
We enter, fire-imbibed, Heavenly, thy sanctuary. Of course, Mrs Richard F. Schiller is Lolita's married name.

Alexey Sklyarenko