God sees us as new, even though the battle still rages, as there is war with our earthly flesh. One day, we will be completely, perfect, but until then, God will help us make our way through, in his spirit with hope, and life. (See notes below)

bible.com/bible/100/2co.5.17.NASB1995

Notes from John MacArthur Study Bible

5:15 As he defended his integrity to the Corinthians, Paul wanted them to know that his old, self-centered life was finished and that he had an all-out desire to live righteously. For all genuine believers, their death in Christ is not only a death to sin, but a resurrection to a new life of righteousness ( see notes on Ro 6:3 , 4 , 8 , 10 ; cf. Gal 2:19 , 20 ; Col 3:3 ). † 5:16 Since Paul’s conversion, his priority was to meet people’s spiritual needs (cf. Ac 17:16 ; Ro 1:13–16 ; 9:1–3 ; 10:1 ). according to the flesh. Paul no longer evaluated people according to external, human, worldly standards (cf. 10:3 ). we know Him in this way no longer. Paul, as a Christian, also no longer had merely a fallible, human assessment of Jesus Christ (cf. Ac 9:1–6 ; 26:9–23 ).

† 5:17 in Christ. These two words comprise a brief but most profound statement of the inexhaustible significance of the believer’s redemption, which includes the following: 1) the believer’s security in Christ, who bore in His body God’s judgment against sin; 2) the believer’s acceptance in Him with whom God alone is well pleased; 3) the believer’s future assurance in Him who is the resurrection to eternal life and the sole guarantor of the believer’s inheritance in heaven; and 4) the believer’s participation in the divine nature of Christ, the everlasting Word (cf. 2Pe 1:4 ). new creature. This describes something that is created at a qualitatively new level of excellence. It refers to regeneration or the new birth (cf. Jn 3:3 ; Eph 2:1–3 ; Titus 3:5 ; 1Pe 1:23 ; 1Jn 2:29 ; 3:9 ; 5:4 ). This expression encompasses the Christian’s forgiveness of sins paid for in Christ’s substitutionary death (cf. Gal 6:15 ; Eph 4:24 ). old things passed away. After a person is regenerate, old value systems, priorities, beliefs, loves, and plans are gone. Evil and sin are still present, but the believer sees them in a new perspective ( see note on v. 16 ), and they no longer control him. new things have come. The Gr. grammar indicates that this newness is a continuing condition of fact. The believer’s new spiritual perception of everything is a constant reality for him, and he now lives for eternity, not temporal things. James identifies this transformation as the faith that produces works ( see notes on Eph 2:10 ; Jas 2:14–25 ).

† 5:18 all these things are from God. All the aspects related to someone’s conversion and newly transformed life in Christ are accomplished by a sovereign God. Sinners on their own cannot decide to participate in these new realities ( see note on Ro 5:10 ; cf. 1Co 8:6 ; 11:12 ; Eph 2:1 ). ministry of reconciliation. This speaks to the reality that God wills sinful men to be reconciled to Himself (cf. Ro 5:10 ; Eph 4:17–24 ). God has called believers to proclaim the gospel of reconciliation to others (cf. 1Co 1:17 ). The concept of service, such as waiting on tables, derives from the Gr. word for “ministry.” Lit. God wants Christians to accept the privilege of serving unbelievers by proclaiming a desire to be reconciled.