'Hearts' in the Bible

“Make the heart of this people insensitive,Their ears dull,And their eyes dim,Otherwise they might see with their eyes,Hear with their ears,Understand with their hearts,And return and be healed.”

When the house of David (Judah) was told, “Aram is allied with Ephraim (Israel),” the hearts of Ahaz and his people trembled as the trees of the forest tremble in the wind.

The [mournful, inspired] oracle (a burden to be carried) concerning Egypt:Listen carefully, the Lord is riding on a swift cloud and is about to come to Egypt;The idols of Egypt will tremble at His presence,And the heart of the Egyptians will melt within them.

Then the Lord said,“Because this nation approaches [Me only] with their wordsAnd honors Me [only] with their lip service,But they remove their hearts far from Me,And their reverence for Me is a tradition that is learned by rote [without any regard for its meaning],

O Lord, why do You cause us to stray from Your waysAnd harden our heart from fearing You [with reverence and awe]?Return for Your servants’ sake, the tribes of Your heritage.