1 John 1:5-9 affirms that if we are committing transgression against God, then we are not walking in the light, and have sin in us.
And if we do transgress, we can repent and be forgiven and cleansed by Jesus Christ.
However, 1 John 1: 8 warns us, that if we transgress and harden our hearts, and say we have no sin to repent of, then we have no hope of forgiveness and cleansing in the blood of the Lamb.
The Lord's sinless perfecting of the saints begins with taking away our sin, and cleansing us from all unrighteousness.
Heb {6:1}
1 John 5:8 directly condemns any transgressing believer, that says his sin is taken away by the Lamb of God.
There is no hope for anyone transgressing God's commandments, and also believing he has been made sinless by Jesus Christ.
Enduring temptation to sin not, is not falling to temptation by transgression.
If we have indwelling sin, then the Lamb of God has not taken away our sin.
Jhn 1:29
And yes, mature Christians can still have their sin untaken away by Jesus Christ. There have been many testimonies of mature Christians, even after many years of ministry, that repent of all their transgressions. They now understand that maturity in religion, does not guarantee being born into the kingdom of God.
Pro 13:15
If any man repents and is regenerated with a new nature, then the old corrupt lust of the heart is taken away, and we are delivered from our old sins and trespasses.
2 Peter 1:3 Rom 3:24
The flesh is still naturally made by Jesus Christ from the dust of the earth, which has neither sin nor righteousness, the same as the grass of the earth.
Isa 40:6
If we blame our bodies as the transgressors, then we mock God's creation as evil, and also make ourselves foolish to the world.
Rom 2:3
Everyone comes into the world with the same natural body and lightened by Christ. If we choose to do evil with the world, then we make ourselves enemies of God with the world. If we repent and trust in the Lord Jesus Christ, then we can be made clean and do good:
Jhn 1:2-4 3 John{1:11}
If we are transgressing God's commandments daily, then with the world we make ourselves enemies of God.
Jas 4:4
James is rebuking those Christians that do transgress God's word daily. However, unlike some Christians, James does not preach to continue doing so, but rather to repent and be a friend of God.
Jas 4:6
As I John 1:8 says, to be a transgressor and claim freedom from sin, is a delusion that reject's God's truth to repent and have our sin taken away.
Jhn 8:34
We that do repent of our transgressions, and have our sin taken away by the Lamb of God, can also have no sin walking in the light, even as Jesus has no sin and is in the light:
1Jo 1:7 1Jo 3:5
We can regularly sin and regularly confess and be forgiven and washed clean by Jesus Christ,
1Jo 1:9
He likewise commands us to regularly forgive the transgressions of others, that also repent:
Mat 18:21
However, regular transgression does not guarantee regular confession. Transgressors can only come to God and confess with godly sorrow, by the Spirit drawing us to Him.
Jhn 6:44
God is not mocked, and if we take His forgiveness for granted, while continuing to regularly transgress His word, then He can let us alone without drawing us regularly back to Him:
Rom 1:21 Jhn 6:65
We can go back to our sins and trespasses regularly, but without God drawing us to repentance, then we can also go back and no longer repent nor walk with Him.
Heb 10:38 Psa 19:13
If we are regularly transgressing God's commandments on a daily basis, then we are willfully rebelling against the Lord daily:
Jas 4:4
Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God.
We that repent of all our transgressions, and have our sin taken away by the Lamb of God, can also by His grace and faith live daily without transgressing His commandments:
Psa 106:3 1 John{3:7} 1 John{2:29} Rev 14:12
We are saints of Jesus Christ. We are not of religions that do less evil than before.
1 Peter {1:15} Jas 1:27
We are saved from doing evil, by having our lust and corruption cleansed from our hearts and souls. We are made free with the Son of God to do good and please the Father:
Mat 1:21 Jhn 8:29 1Jo 2:6
Jesus died for our sins and rose again from the dead, that we may repent of our own sins, be forgiven and washed clean in His blood, and be saved and justified from committing any more evil against Him and the Father:
Rom 4:24 Rev 12:17