"He was formal in a rather awkward New England sense. His voice was soft and slow as he read the students' poems. At first I felt the impatient desire to interrupt his slow, line-by-line readings. He would read the first line, stop, and then discuss it at length. I wanted to go through the whole poem quickly and then go back. I couldn't see any merit in dragging through it until you almost hated the damned thing, even your own poems, especially your own. At that point, I wrote to Snodgrass about my impatience, and his reply went this way, "Frankly, I used to nod my head at his every statement, and he taught me more than a whole gang of scholars could." So I kept my mouth shut, and Snodgrass was right. Robert Lowell's method of teaching is intuitive and open. After he had read a student's poem, he would read another evoked by it. Comparison was often painful. He worked with a cold chisel, with no more mercy than a dentist. He got out the decay, but if he was never kind to the poem, he was kind to the poet."
January 1, 1970
https://en.wikiquote.org/wiki/Robert_Lowell