8 “Behold I have gone afar fleeing, and have abode in the desert”. In what desert? Wherever you shall be, there will gather them together other men, the desert with you they will seek, will attach themselves to your life, you can not thrust back the society of brethren: there are mingled with you also evil men; still exercise is your due portion, “Behold I have gone afar, and have abode in the desert.” In what desert? It is perchance in the conscience, whither no man enters, where no one is with you, where you are and God. For if in the desert, in any place, what will you do with men gathering themselves together? For you will not be able to be separated from mankind, so long as among men you live?
Source: The Enarrations, or Expositions, on the Psalms (New Advent)