'Heart' in the Bible

He hath blinded their eyes, and he hardened their heart; Lest they should see with their eyes, and perceive with their heart, And should turn, And I should heal them.

And during supper, the devil having already put into the heart of Judas Iscariot, Simon's'son , to betray him,

Let not your heart be troubled: believe in God, believe also in me.

Peace I leave with you; my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be fearful.

But because I have spoken these things unto you, sorrow hath filled your heart.

And ye therefore now have sorrow: but I will see you again, and your heart shall rejoice, and your joy no one taketh away from you.