'Heart' in the Bible

and oppress not the widow and the fatherless, the stranger and the afflicted; and let none of you imagine evil against his brother in your heart.

And they made their heart as an adamant, that they should not hear the law, and the words that Jehovah of hosts sent by his Spirit by the hand of the former prophets: therefore was there great wrath from Jehovah of hosts.

And they of Ephraim shall be like a mighty man, and their hearts shall rejoice as through wine; and their children shall see it, and rejoice; their heart shall be joyful in Jehovah.

And the leaders of Judah shall say in their heart, The inhabitants of Jerusalem shall be my strength through Jehovah of hosts their God.