Let the credulous and the vulgar continue to believe that all mental woes can be cured by a daily application of old Greek myths to their private parts.

The line is a characteristically barbed Nabokovian jab at reductive, fashionable psychologizing—especially the tendency to treat classical myth (and by extension Freudian/Jungian archetypes) as a universal solvent for personal distress, often with an obsessive focus on sexuality. By contrasting “the credulous and the vulgar” with the implied stance of the discerning reader, the speaker dismisses such interpretive systems as both gullible and coarse: they impose prefabricated stories onto intimate life rather than attending to the particularities of individual experience and art. The phrasing also satirizes the quasi-medical promise of “cure” through ritual “daily application,” suggesting a mechanical, almost ointment-like use of myth that trivializes both suffering and literature.