You lecture for a quarter of an hour, for half an hour, when you notice that the students are beginning to look at the ceiling, at Pyotr Ignatyevitch; one is feeling for his handkerchief, another shifts in his seat, another smiles at his thoughts. . . . That means that their attention is flagging. Something must be done. Taking advantage of the first opportunity, I make some pun. A broad grin comes on to a hundred and fifty faces, the eyes shine brightly, the sound of the sea is audible for a brief moment. . . . I laugh too. Their attention is refreshed, and I can go on.
No kind of sport, no kind of game or diversion, has ever given me such enjoyment as lecturing. Only at lectures have I been able to abandon myself entirely to passion, and have understood that inspiration is not an invention of the poets, but exists in real life, and I imagine Hercules after the most piquant of his exploits felt just such voluptuous exhaustion as I experience after every lecture.
That was in old times. Now at lectures I feel nothing but torture. Before half an hour is over I am conscious of an overwhelming weakness in my legs and my shoulders. I sit down in my chair, but I am not accustomed to lecture sitting down; a minute later I get up and go on standing, then sit down again. There is a dryness in my mouth, my voice grows husky, my head begins to go round. . . . To conceal my condition from my audience I continually drink water, cough, often blow my nose as though I were hindered by a cold, make puns inappropriately, and in the end break off earlier than I ought to. But above all I am ashamed.