I don't need to praise anything so justly famous as Frost's observation of and empathy with everything in Nature from a hornet to a hillside; and he has observed his own nature, one person's random or consequential chains of thoughts and feelings and perceptions, quite as well. (And this person, in the poems, is not the alienated artist cut off from everybody who isn't, yum-yum, another alienated artist; he is someone like normal people only more so — a normal person in the less common and more important sense of normal.)

The Other Frost, p. 29 - Poetry and the Age (1953)