Surely Allah is not ashamed to set forth any parable-- (that of) a gnat or any thing above that; then as for those who believe, they know that it is the truth from their Lord, and as for those who disbelieve, they say: What is it that Allah means by this parable: He causes many to err by it and many He leads aright by it! but He does not cause to err by it (any) except the transgressors,

See what they liken you to! So they have gone astray and cannot find the way.

See what likenesses do they apply to you, so they have gone astray, therefore they shall not be able to find a way.