new heart. Not the old heart improved, but. new heart created and "given". The old one "taken away".
spirit. Hebrew. ruach. App-9.
Related Commentaries of Ezekiel 36:26
Ezekiel 36:26
26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.