'Empty headed' in the Bible

And among the naive [the inexperienced and gullible],I saw among the youthsA young man lacking [good] sense,

Excellent speech does not benefit a fool [who is spiritually blind],Much less do lying lips benefit a prince.

He who becomes the parent of a fool [who is spiritually blind] does so to his sorrow,And the father of a fool [who is spiritually blind] has no joy.

Under a servant when he reigns,Under a [spiritually blind] fool when he is filled with food,