Nabokov was professor of literature at Cornell from 1948-1959. The excerpt below is from a 1964 Playboy interview, reproduced at longform.org (a site I highly recommend).
Nabokov: I gave up teaching—that’s about all in the way of change. Mind you, I loved teaching, I loved Cornell, I loved composing and delivering my lectures on Russian writers and European great books. But around 60, and especially in winter, one begins to find hard the physical process of teaching, the getting up at a fixed hour every other morning, the struggle with the snow in the driveway, the march through long corridors to the classroom, the effort of drawing on the blackboard a map of James Joyce’s Dublin or the arrangement of the semi-sleeping car of the St. Petersburg-Moscow express in the early 1870s—without an understanding of which neither Ulysses nor Anna Karenina, respectively, makes sense. For some reason my most vivid memories concern examinations. Big amphitheater in Goldwin Smith. Exam from 8 a.m. to 10:30. About 150 students—unwashed, unshaven young males and reasonably well-groomed young females. A general sense of tedium and disaster. Half-past eight. Little coughs, the clearing of nervous throats, coming in clusters of sound, rustling of pages. Some of the martyrs plunged in meditation, their arms locked behind their heads. I meet a dull gaze directed at me, seeing in me with hope and hate the source of forbidden knowledge. Girl in glasses comes up to my desk to ask: “Professor Kafka, do you want us to say that…? Or do you want us to answer only the first part of the question?” The great fraternity of C-minus, backbone of the nation, steadily scribbling on. A rustic arising simultaneously, the majority turning a page in their bluebooks, good teamwork. The shaking of a cramped wrist, the failing ink, the deodorant that breaks down. When I catch eyes directed at me, they are forthwith raised to the ceiling in pious meditation. Windowpanes getting misty. Boys peeling off sweaters. Girls chewing gum in rapid cadence. Ten minutes, five, three, time’s up.The first paragraph of Lolita, one of my favorites in all of literature:
Lolita, light of my life, fire of my loins. My sin, my soul. Lo-lee-ta: the tip of the tongue taking a trip of three steps down the palate to tap, at three, on the teeth. Lo. Lee. Ta.