God's word teaches that through redemption in Christ a person becomes spiritually restored(remade into his image) and born again from above. God "regenerates" a persons heart and undoes the damage that occured at the fall of man. God heals a person by dealing with the infection of sin and how it brought a mutation and deviation from his original design. In Christ is man perfected and restored! Jesus did more than come to tell us we have to do right. He said we must be born again(through the holy spirit) for our connection to God to be restored! He came to free us from the deviation and sickness of sin and its hold over us!
3 Jesus answered him, “I assure you and most solemnly say to you, unless a person is born again [reborn from above—spiritually transformed, renewed, sanctified], he cannot [ever] see and experience the kingdom of God.”
6 That which is born of the flesh is flesh [the physical is merely physical], and that which is born of the Spirit is spirit. 7 Do not be surprised that I have told you, ‘You must be born again [reborn from above—spiritually transformed, renewed, sanctified].’
12 But to as many as did receive and welcome Him, He gave the right [the authority, the privilege] to become children of God, that is, to those who believe in (adhere to, trust in, and rely on) His name— 13 who were born, not of blood [natural conception], nor of the will of the flesh [physical impulse], nor of the will of man [that of a natural father], but of God [that is, a divine and supernatural birth—they are born of God—spiritually transformed, renewed, sanctified].
1 John 3:9
9 No one who is born of God [deliberately, knowingly, and habitually] practices sin, because [a]God’s seed [His principle of life, the essence of His righteous character] remains [permanently] in him [who is born again—who is reborn from above—spiritually transformed, renewed, and set apart for His purpose]; and he [who is born again] cannot habitually [live a life characterized by] sin, because he is born of God and longs to please Him.
5 For if we have become one with Him [permanently united] in the likeness of His death, we will also certainly be [one with Him and share fully] in the likeness of His resurrection. 6 We know that our old [a]self [our human nature without the Holy Spirit] was nailed to the cross with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin. 7 For the person who has died [with Christ] has been freed from [the power of] sin.
5 He saved us, not because of any works of righteousness that we have done, but because of His own compassion and mercy, by the cleansing of the new birth (spiritual transformation, regeneration) and renewing by the Holy Spirit, 6 whom He poured out richly upon us through Jesus Christ our Savior,