My own feathers [what an ludicrous phrase to have to utter] are not my priority. I cannot be certain which are the ones I seek; therefore I must collect them indiscriminately.
[He has no way of knowing which ones belong to Ciel, after all... but he'll gather every last one in this wretched world if need be. If he ends up intruding on everyone's private memories, well, he really couldn't care less.]