'Emptiness' in the Bible

“Let him not trust in emptiness, deceiving himself;For emptiness will be his reward.

For in many dreams and in many words there is emptiness. Rather, fear God.

But pelican and hedgehog will possess it,And owl and raven will dwell in it;And He will stretch over it the line of desolationAnd the plumb line of emptiness.

“Behold, all of them are false;Their works are worthless,Their molten images are wind and emptiness.

Thus says the Lord,“What injustice did your fathers find in Me,That they went far from MeAnd walked after emptiness and became empty?