"Sons and Lovers" possesses a double quality to a high degree. It ranks high, very high as a piece of literature and at the same time it embodies a theory which it illustrates and exemplifies with a completeness that is nothing less than astonishing. Fortunately there can be no doubt as to the authenticity of the author's inspiration. For it would be fatal if the novel had been written with the express purpose of illustrating a theory: it would, by that very admission, be worthless as a proof of that theory. But it happens that Mr. Lawrence has already produced notable work, mainly some early and evidently autobiographical poems, which show his preoccupation with the identical theme. "Sons and Lovers" is thus truly creative, in that it is built up internally—as any masterpiece must be—out of the psychic conflicts of the author, and any testimony which it may bear to the truth of the theory involved will therefore be first hand.
--The Psychoanalytic Review, Volume 3