Remove from them their heart of stone and give them a heart of flesh

Ezekiel 11:14:25
Therefore say: ‘This is what the Sovereign Lord says: I will gather you from the nations and bring you back from the countries where you have been scattered, and I will give you back the land of Israel again.’
 I will give them an undivided heart and put a new spirit in them; I will remove from them their heart of stone and give them a heart of flesh. 
Then the cherubim, with the wheels beside them, spread their wings, and the glory of the God of Israel was above them. The glory of the Lord went up from within the city and stopped above the mountain east of it.
Why?
God has promised that his people will come back from the countries where they have been scattered.
God will give them an undivided heart and a new spirit in them.
Change from heart of stone to a heart of flesh. This is the changing of my heart before Christian and after. It is the work of the Holy Spirit. For such as me so hard heart man may turn to the Lord.
God's glory moved from the Temple in Jerusalem and mountain of east them lift up and away from Israel.
Jesus is next salvation came from the Lord for us.
How?
Appreciate the gift from the Lord, Jesus Christ as our savior.