And if their disinclination and turning away is distressing you (and you ardently desire them to believe in any case) then, if possible, manage a tunnel, (going down) into the earth, or seek some ladder, (climbing up) to heaven, and bring them some (exceptional) Sign (to show them, even then they will not believe). And if Allah so willed, He would indeed assemble them together on guidance. So (owing to the overwhelming enthusiasm generating from your compassion, kindness and concern) be not unaware (of their ill fortune).