Yes, as long as I respond to God's discipline when confronted about it. But if I resist and reject his correction, eventually I will be turned over to it as an unbeliever who has chosen not to receive God's grace.
if a person does not repent he is not blameless before God.
Yes, but you do not have to achieve a record of sinless perfection to be righteous as he is righteous. Growth in ever increasing traits of the Spirit establishes that, not a state of sinless perfection.
Yes; however if I am righteous by faith, it will result in my having a practical righteousness even as He is righteous.
Yes, but being blameless does not mean achieving a state of sinless perfection.
There you go with that misnomer again. No one is "sinlessly perfect" except for Jesus, who never sinned.
All have sinned and come short of the glory of God.
Saying that I have sinned is not the same as saying that I must sin in the present or the future.
Saying that I "have no sin" may be the same as saying that "I have not sinned"...if 1 John 1:8 is applicable the same way that Hebrews 4:15 is applicable, then to say that I have no sin may not be to say that I have not indwelling sin...it may be to merely say that I have not sinned.
I have sinned; there is no one who hasn't; except for Christ Himself. Jesus was without sin; and that means, in Hebrews 4:15, that He had never sinned. So, if it means the same in 1 John 1:8, then I can say that I have not indwelling sin and not be deceiving myself, as long as I am admitting that I have sinned.
Colossians 2:11 (especially in the nlt) gives credence to this interpretation; along with the concept that there is no sin
in Jesus (1 John 3:5) and that we are
in Jesus (1 John 5:20 and other verses).
The other option is that when it says that we have no sin, it is speaking of indwelling sin; which can be rendered dead (Romans 6:6, Galatians 5:24, Romans 7:8) so that it has no authority over my behaviour (Romans 6:14, Romans 8:12 (kjv, nlt)).
So, in response to your quote, above:
Being blameless does not mean achieving a state of sinless perfection; in that all of us have sinned, and many of us do have indwelling sin.
But it can mean that we are set free from the power of sin so that it is no longer our master; and
that means that we can walk in complete victory and freedom over it.
Jhn 8:34, Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin.
If I commit sin (even one time), then I am a slave of sin.
Therefore, to be set free from sin (free indeed) means that I will be set free completely from the practicing of sin (the committing of it, even one time, in the future).
If I am born of God, then I "cannot sin" (1 John 3:9).
Act 17:30, And the times of this ignorance God winked at; but now commandeth all men every where to repent: