Marianne Moore said this quote
“ Wolf's wool is the best wool, but it cannot be sheared, because the wolf will not comply. With knowledge as with wolves' surliness, the student studies voluntarily, refusing to be less than individual. He gives his opinion and then rests upon it; he renders service when there is no reward, and is too reclusive for some things to seem to touch him; not because he has no feeling but because he has so much. ”