Ah, right out of the People-To-People platform... Bob George and Company...
Though you may never have even heard of these... what you posted is what they taught.
This is why I teach (beyond the preliminary 1 John 1:9 ← because it is usually all that is taught on the subject...) that we must study the verse in context of 1 John 1:5 through 1 John 2:17 (which I strongly urge is repeatedly read and as a single block of text) to understand that believers are spoken to (not unbelievers) and that this is what forever saved individuals do about sin after being saved:
1 John 1:5–2:17 (AV)
5 This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
7 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.
9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
10 If we say that we have not sinned, we make him a liar, and his word is not in us.
1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
3 And hereby we do know that we know him, if we keep his commandments.*
4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
6 He that saith he abideth in him ought himself also so to walk, even as he walked.
7 Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
8 Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
9 He that saith he is in the light, and hateth his brother, is in darkness even until now.
10 He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.
11 But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes.
12
I write unto you, little children, because your sins are forgiven you for his name’s sake.
13 I write unto you, fathers,
because ye have known him that is from the beginning. I write unto you, young men,
because ye have overcome the wicked one. I write unto you, little children,
because ye have known the Father.
14 I have written unto you, fathers,
because ye have known him that is from the beginning. I have written unto you, young men, because ye are strong,
and the word of God abideth in you, and ye have overcome the wicked one.
15 Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him.
16 For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.
17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.
The darkness / blindness etc. spoken of in the passage are of temporal matters in the believer's life.
Keeping his commands:
- Believe in the genuine Jesus (John 3:16, Ephesians 2:8-10, John 6:29, John 16:27)
- Love one another (John 13:34)
The underscored / highlighted do not speak to unbelievers but believers who sometimes lapse into the same self righteousness the Sanhedrin did...
Without saving faith in Jesus it is impossible to even know the Father or who he is...
John 16:1–3 (AV)
1 These things have I spoken unto you, that ye should not be offended.
2 They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service.
3 And these things will they do unto you, because
they have not known the Father, nor me.
Or the Holy Spirit for that matter (14:17).