John 3:5

“Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh.

who were born, not of blood nor of the will of the flesh nor of the will of man, but of God.

Jesus answered and said to him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.”

Now I say this, brothers, that flesh and blood cannot inherit the kingdom of God, nor does the corruptible inherit the incorruptible.

He saved us, not by works which we did in righteousness, but according to His mercy, through the washing of regeneration and renewing by the Holy Spirit,