'Hearts' in the Bible

And they prayed [and] said, "You, Lord, who know the hearts of all, show clearly which one of these two you have chosen

to whom our fathers were not willing to become obedient, but rejected [him] and turned [back] in their hearts to Egypt,

"[You] stiff-necked [people] and uncircumcised in hearts and in [your] ears! You constantly resist the Holy Spirit! As your fathers [did], [so] also [do] you!

Now [when they] heard these [things], they were infuriated in their hearts and gnashed [their] teeth at him.

who, [when he] arrived and saw the grace of God, rejoiced and encouraged [them] all to remain true to the Lord with {devoted hearts},

And yet he did not leave himself without witness [by] doing good, giving you rain from heaven and fruitful seasons, satisfying [you] with food and your hearts with gladness."

And he made no distinction between us and them, cleansing their hearts by faith.