(And if their aversion is grievous unto thee, then, if thou canst, seek a way down) a tunnel (into the earth) such that you enter it (or a ladder) or a method or way which enables you to rise (unto the sky that thou mayst bring unto them a portent (to convince them all)) then do so! (If Allah willed, He could have brought them all together to the guidance) to the declaration of Allah's divine Oneness. (So be not thou among the foolish ones) regarding My decree about their disbelief.