¹⁸ They do not know nor understand; For He has shut their eyes, so that they cannot see, And their hearts, so that they cannot understand.

¹⁸ Pretty stupid, wouldn't you say? Don't they have eyes in their heads? Are their brains working at all?

¹⁸ They have not known nor understood: for he hath shut [1] their eyes, that they cannot see; and their hearts, that they cannot understand.