Mathematician John Isbell (1930-2005), commenting on his Category Theory colleague William Lawvere (1937-2023):

... Talking with Bill, I often feel like a fly buzzing around a cow. (It seems to me I can liken Bill to a cow, if I’m just a fly myself.) On any easy question, I’ll probably see the answer first. But his thoughts seem to move on a level where I don’t function. I can barely see down there. ...

from "An Interview with John Isbell" by K. D. Magill, Jr. – ^z - 2023-03-19