- When heart is used for our minds, it is specifically used for our minds because our minds are our inner-flesh (inner man, the part of our flesh that is inside us).
Ephesians 3:16-17 (KJV) That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man;  That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love,
- Jesus uses the word “heart” seemingly synonymously with “belly” and clearly uses the word for the inside/center of the earth.
Matthew 12:40 (KJV) For as Jonas was three days and three nights in the whale’s belly; so shall the Son of man be three days and three nights in the heart of the earth.
- The word heart is also used for inside of our body, where the Holy Spirit lives (not to be confused with inner-man, which is referring to our mind).
Romans 5:5 (NKJV) Now hope does not disappoint, because the love of God has been poured out in our hearts by the Holy Spirit who was given to us.