When he presents the composer's thought, a good conductor does twenty things at once. He reads the score, waves his baton, watches the singer makes a gesture now towards the drum, now to the double-bass, and so on. It is the same with me when lecturing. I have some hundred and fifty faces before me, quite unlike each other, and three hundred eyes staring me straight in the face. My purpose is to conquer this many-headed hydra. If I have a clear idea how far they are attending and how much they are comprehending every minute while I am lecturing, then the hydra is in my power. My other opponent is within me. This is the endless variety of forms, phenomena and laws, and the vast number of ideas, whether my own or others', which depend upon them. Every moment I must be skilful enough to choose what is most important and necessary from this enormous material, and just as swiftly as my speech flows to clothe my thought in a form which will penetrate the hydra's understanding and excite its attention. Besides I must watch carefully to see that my thoughts shall not be presented as they have been accumulated, but in a certain order, necessary for the correct composition of the picture which I wish to paint. Further, I endeavour to make my speech literary, my definitions brief and exact, my sentences as simple and elegant as possible. Every moment I must hold myself in and remember that I have only an hour and forty minutes to spend. In other words, it is a heavy labour. At one and the same time you have to be a savant, a schoolmaster, and an orator, and it is a failure if the orator triumphs over the schoolmaster in you or the schoolmaster over the orator.
After lecturing for a quarter, for half an hour, I notice suddenly that the students have begun to stare at the ceiling or Peter Ignatievich. One will feel for his handkerchief, another settle himself comfortably, another smile at his own thoughts. This means their attention is tried. I must take steps. I seize the first opening and make a pun. All the hundred and fifty faces have a broad smile, their eyes flash merrily, and for a while you can hear the boom of the sea. I laugh too. Their attention is refreshed and I can go on.