'Heart' in the Bible

It was during supper, when the devil had already put [the thought of] betraying Jesus into the heart of Judas Iscariot, Simon’s son,

I assure you and most solemnly say to you, the one who receives and welcomes whomever I send receives Me; and the one who receives Me receives Him who sent Me [in that same way].”

the Spirit of Truth, whom the world cannot receive [and take to its heart] because it does not see Him or know Him, but you know Him because He (the Holy Spirit) remains with you continually and will be in you.

And He, when He comes, will convict the world about [the guilt of] sin [and the need for a Savior], and about righteousness, and about judgment:

about righteousness [personal integrity and godly character], because I am going to My Father and you will no longer see Me;