Here, being in exile prevents Nabokov from making that knight's move. And you might think about that homophobic attitude to a Proustian past, the fear that it's too like what he wants to do.
These are often distilled into deadpan rituals, with the director maintaining his Proustian interest in habit in its capacity both to mortify and console.
Indeed, if I were to describe the sugar, corn syrup and pectin lozenge that, above all others, might conjure Proustian memories of childhood Easters, it would be the purple jelly bean.