Quite unnecessarily, I look at my watch and say: "Well, it's time to go in."

And we march into the room in the following order: foremost goes Nikolay, with the chemicals and apparatus or with a chart; after him I come; and then the carthorse follows humbly, with hanging head; or, when necessary, a dead body is carried in first on a stretcher, followed by Nikolay, and so on. On my entrance the students all stand up, then they sit down, and the sound as of the sea is suddenly hushed. Stillness reigns.

I know what I am going to lecture about, but I don't know how I am going to lecture, where I am going to begin or with what I am going to end. I haven't a single sentence ready in my head. But I have only to look round the lecture-hall (it is built in the form of an amphitheatre) and utter the stereotyped phrase, "Last lecture we stopped at . . ." when sentences spring up from my soul in a long string, and I am carried away by my own eloquence. I speak with irresistible rapidity and passion, and it seems as though there were no force which could check the flow of my words. To lecture well -- that is, with profit to the listeners and without boring them -- one must have, besides talent, experience and a special knack; one must possess a clear conception of one's own powers, of the audience to which one is lecturing, and of the subject of one's lecture. Moreover, one must be a man who knows what he is doing; one must keep a sharp lookout, and not for one second lose sight of what lies before one.