There is a juridical dimension to justification where we are declared to be just. Likewise, there is an infused dimension. It is this dimension that you seem to ignore. The importance of this dimension can be demonstrated by the following scriptures but there are many others as well.
An examination of Isaiah 55:10-11 reveals that God’s grace goes out in power and that it accomplishes his purpose and that it prospers in the thing which he sends it. What is God’s purpose in giving us his grace and the gift of faith? God’s purpose is to reconcile us to himself and to make us a new creation in Christ Jesus for good works.[Eph 21:8-10]
It can further be said that God’s purpose is to make us “…conformed to the image of his Son, in order that he might be the first-born among many brethren.”[Romans 8:29]
Paul also addresses the issue of what it means to be a new creation in the following:
WHAT SHALL we say then? Are we to continue in sin that grace may abound? By no means! How can we who died to sin still live in it? Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, so that as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his. We know that our old self was crucified with him so that the sinful body might be destroyed, and we might no longer be enslaved to sin.
Likewise, my brethren, you have died to the law through the body of Christ, so that you may belong to another, to him who has been raised from the dead in order that we may bear fruit for God. While we were living in the flesh, our sinful passions, aroused by the law, were at work in our members to bear fruit for death. But now we are discharged from the law, dead to that which held us captive, **so that we serve not under the old written code but in the new life of the Spirit. **
2 Cor 5:14-17
For the love of Christ controls us, because we are convinced that one has died for all; therefore all have died. And he died for all, that those who live might live no longer for themselves but for him who for their sake died and was raised. From now on, therefore, we regard no one from a human point of view; even though we once regarded Christ from a human point of view, we regard him thus no longer. Therefore, if any one is in Christ, he is a new creation; the old has passed away, behold, the new has come.
For neither circumcision counts for anything, nor uncircumcision, but a new creation.
For through the Spirit, by faith, we wait for the hope of righteousness. For in Christ Jesus neither circumcision nor uncircumcision is of any avail, but faith working through love.
Now the works of the flesh are plain: fornication, impurity, licentiousness, idolatry, sorcery, enmity, strife, jealousy, anger, selfishness, dissension, party spirit, envy, drunkenness, carousing, and the like. I warn you, as I warned you before, that those who do such things shall not inherit the kingdom of God. But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such there is no law. And those who belong to Christ Jesus have crucified the flesh with its passions and desires. If we live by the Spirit, let us also walk by the Spirit. Let us have no self-conceit, no provoking of one another, no envy of one another.
John 3:1-2 says:
“SEE WHAT love the Father has given us, that we should be called children of God; and so we are. The reason why the world does not know us is that it did not know him. Beloved, we are God’s children now” Just like in Isaiah, God’s word goes out in power. When God declares us children we actually become his children, and his grace will fulfill his purpose and his grace will prosper within us.
Peter says, “His divine power has granted to us all things that pertain to life and godliness, through the knowledge of him who called us to his own glory and excellence, by which he has granted to us his precious and very great promises, that through these you may escape from the corruption that is in the world because of passion, and become partakers of the divine nature."
All of this sheds light on what it means to be a new creation. Eph 2:8-10 speaks of justification in the juridical sense as well as the transformational sense. We are not simply declared righteous but we are made righteous because God’s word goes out in power and does not return to him empty. We are made a new creation in Christ Jesus for good works. God’s word and grace accomplish that which is his purpose and they prosper within us unto salvation.