This is the nature and life of the new man in christ, the effect of the regenerative power of Christ in his spirit, soul and body.
Galatians 6:15 "For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature."
2corinthians 5:17 "Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new."
This is the cardinal point, that is, he is totally new, never existed or pre-existed. His new kind of life comes directly from God of which he is born of God. John 1:12 "But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: 13 Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God."
Salvation is by grace. Ephesians 2:4 "But God, who is rich in mercy, for his great love wherewith he loved us, 5 Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved;)"
Romans 3:24 "Being justified freely by his grace through the redemption that is in Christ Jesus:
No one qualified us and no man can disqualify us. Our past is over. We have received abindance of grace to enjoy the beautiful life in Christ" Romans 5:17 "For if by one man’s offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ."
All we have to do is receive it by faith. Through faith in Christ we stand justified and aquainted.
Romans 5:1 "Therefore being justified by faith, we have peace with God through our Lord Jesus Christ: 2 By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God."
Two things that prove the certainty of our salvation are (a)The word of God Romans 10:9 "That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. 10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation."
(b) the witness of the Holy Spirit. Romans 8:16 The Spirit itself beareth witness with our spirit, that we are the children of God.
Our feelings has nothing to do with this, there is an inner witness that we are born again.
Note that man is a spirit; he has a soul and lives in a body. 1thessalonians 5:23 "And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ."
It is the spirit that got born again, that's why he can relate with God 1corinthians 6:17 "But he that is joined unto the Lord is one spirit."
And by feeding on the word of God his spirit is renewed. This renewal takes place in our minds(soul). The soul is the processing center of man. It is the door way of the spirit. Man's thought resides here. Our actions are as a result of our thought Romans 12:1 "I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. 2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God. 3 For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith."
What happens here affects our spirit as well as our body. We must bring our body under subjection. Colossians 3:5 Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry: 6 For which things’ sake the wrath of God cometh on the children of disobedience: 7 In the which ye also walked some time, when ye lived in them. 8 But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth. 9 Lie not one to another, seeing that ye have put off the old man with his deeds; 10 And have put on the new man, which is renewed in knowledge after the image of him that created him:
As we worship God in spirit and truth we can now bear the fruits of the recreated human spirit found in Galatians 5:22 But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, 23 Meekness, temperance: against such there is no law.