"وما أنت بهاد العمي عن ضلالتهم إن تسمع إلا من يؤمن بآياتنا فهم مسلمون".
You are not able to guide those who have deviated from the straight path, onto treading the right path. Neither are you able to make anyone hear something beneficial to them, except those who believe in My Verses, because only they are the ones who will benefit from whatever you say; they are the ones submissive and accepting of My command.