Professor Botstein, who is clearly a calm, cool, and collected person by nature, is not without talent. He just doesn't have any talent for art. He talks about it as one would any subject one has little interest in but has been tasked to speak about – with reserve and without affect, as illustrated by the almost annoying lack of "ers" and "ums." He is rehearsed.
If you want to hear the passionate Professor Botstein, watch what happens when he talks about something he really does know and love: music. His facial expressions, tone of voice, and body language come to life when he talks about his true passion. His demeanor is similar to that of an excited child. He even refers to music as the easier of the arts to talk about. Why? Because it is his true passion. Art is not.
So what is art? If you've stripped away everything that I've said isn't art, you will find yourself surrounded by art and artists. To know art, you must study it, see it, look for it, and feel it. It isn't everywhere; it isn't in everything and everyone is not an artist. Art is a joyous, adventurous and/or dark struggle, an embrace and a channel between artist and paint, canvas, wall, ink, pen, pencil, charcoal, paper, chisel, stone, chalk, sidewalk, camera, and light. All else is something else. But it isn't art.