Create in me a new heart, O God, and renew a steadfast spirit within me. Do not cast me away from your presence or take away Holy Spirit from me. Restore to me the joy of your salvation and grant me a willing spirit to sustain me. Psalms 51:10-12

I will give you a new heart and I will put a new spirit in you. I will remove from their heart of stone and give them a heart of flesh. Then they will follow my decrees and be careful to follow my laws. They will be my people and I will be their God. Ezekiel 11:19

Do not conform to the pattern of this world, but be transformed by the renewing of the mind, then you will be able to test and approve what God’s will is his good, pleasing and perfect will. Romans 12:2

And he who searches our hearts knows the mind of Christ because the Spirit intercedes for God’s people in accordance with the will of the people. Romans 8:27

Very truly I tell you, no one can enter the kingdom of God unless they are born again of water and the Spirit. Flesh gives birth to flesh, but the Spirit gives birth to the Spirit. John 5:6