From the 12/24 - 31 New Yorker:
Nabokov once claimed that the inspiration for Lolita was an art work produced by an ape in the Jardin des Plantes: a drawing of the bars of its cage. It's a good metaphor for artistic production. What else do we ever draw, besides the bars of our cage, or the wheelbarrow we rode in as crippled children? How else do cages get smashed? How else will we stand on our own feet?