They were shy, all but unappeasably
shy, but they weren't really sinister; at least they weren't as he had hitherto felt them - before they had taken the Form he so yearned to make them take, the Form he at moments saw himself in the light of fairly hunting on tiptoe, the points of his evening shoes, from room to room and from storey to storey.
From the very beginning of the Trilogy, he has always identified his inner self with the monstrous and the unappeasably
And indeed looking back it's rather astonishing that of all the Jews in the world just one man, however flawed, systematically unappeasably
dedicated himself to being the world's "bad conscience" and the Nazi's living nightmare.