You say this for 1 John 1:8.
"There are those in the Christian community who claim to be without sin. Such people are also self-deceived, turning a blind eye to their own sins.
This is not simply a denial of one's sinful nature. For in clarifying what is meant by the claim to be "without sin", John contrasts it with the idea of confessing our sins. Thus to claim to be without sin is the claim that a person no longer commits sins.
True that perhaps every Christian has certain blind spots in their lives, areas in which they are not aware of committing sin. For God tends to progressively reveal sin so that the person may mature gradually and not be overwhelmed and discouraged in the light of the depth of their sinfulness. But for a person to be completely bind to their own sin, such is indicative of one who is unsaved, walking in complete darkness."~ BCBSR.
Here is my beginning response to this:
You claim this on your commentary for 1 John 2:4:
"This is one of the external evidences that one has come to know Christ. Jesus said, "Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven." Mt 7:21 In fact referring to Jesus as Lord is not supposed to be simply an acknowledgement of his Diety, but rather it's supposed to imply one's intention of doing what he says. Thus Jesus asks the rhetorical question, "Why do you call me, ‘Lord, Lord,’ and do not do what I say?" Luke 6:46
A person has not come to know Christ, let alone believe in him, if they have simply prayed a prayer to be saved without any actual intention of obeying him. That is not the kind of faith the qualifies one for salvation."
So it appears that have not harmonized 1 John 1:8 with 1 John 2:4. You cannot declare that you are in grievous sin by using the standard OSAS interpretation on 1 John 1:8 and yet also say that you are also obeying the Lord and keeping His commandments as a part of 1 John 2:4 (otherwise one is not saved). I think you fail to understand that not all sin is the same. There are sins that do not lead unto death - See 1 John 5:16-17. While 1 John 5 is talking about confessed sin vs unconfessed sin, the “sin not unto death” can also extend to minor faults or transgressions (like disobeying the command to be baptized; For water baptism (while important) is not a salvation issue - See 1 Peter 3:21). Yet, Christians are to overcome grievous sin that leads to spiritual death like: Murder, hate, adultery, theft, etc. If not they are showing that they do not know the Lord according to 1 John 2:4; And a person cannot have life without the Son (See 1 John 5:12). You say that it is wrong for a Christian to claim to be without sin. Clever word play. Of course Christians believe they have sinned as a part of their old life, and new Christians who have yet to mature in the faith can stumble, but when they mature, they walk uprightly. We know this because Galatians 5:24 says that they that are Christ's have crucified the affections and lusts. 1 Peter 4:1-2 says that person who has suffered in the flesh has ceased from sin and that we should live the rest of our time (here on Earth) not to the lusts of the flesh, but to the will of God. You cannot claim that you are always in sin of some kind and also say you are doing the will of God. While John does say to confess sin in 1 John 1:9, he also says to "sin not" in 1 John 2:1. Jesus says to "sin no more." (John 5:14) (John 8:11). So you are isolating verses you prefer to see and ignoring others.
You also said that all Christians who say that they have no sin (implying that a believer cannot overcome sin) are self deceived and are not willing to look at their own sins. Are you going to tell the 144,000 that? (See Revelation 14:3-5). Even OT saints were able to keep God's commandments blamelessly (See Luke 1:5-6). Are you going to say that they are self deceived?
Anyways, I will try and reply to the rest of your commentary on this later.
I gotta run.
May God's love shine upon you (even if we disagree on Scripture strongly).