1John 2:6 He that saith he abideth in him ought himself also so to walk, even as he walked.
If you claim that you are saved then you should walk even as he walked.
1John 2:17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.
What does eternal life mean? Does it mean that you abide forever? Because this verse says that he that doeth the will of God abides forever.
1John 2:28 And now, little children, abide in him; that, when he shall appear, we may have confidence, and not be ashamed before him at his coming.
You claim "once saved always saved", perhaps, but I don't want to be ashamed at the Lord's coming and that means you need to abide in Him. That is not once for all, you make your home in the Lord. You go to sleep in Him, you wake up in Him, you live and walk and have your being in Him.
1John 3:15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.
Enough with this pathetic attempt to say we can't know who is saved and who isn't. If you hate your brother you are a murderer and no murderer has eternal life abiding in him.
Mark 8:38 Whosoever therefore shall be ashamed of me and of my words in this adulterous and sinful generation; of him also shall the Son of man be ashamed, when he cometh in the glory of his Father with the holy angels.
Again, whatever you are talking about as "salvation" is a very poor salvation. I don't want to ashamed, I don't want to be saved through fire, I don't want my works burned up, I want to build with gold, silver and precious stones, I don't want to suffer loss at my salvation.
Hebrews 2:11 For both he that sanctifieth and they who are sanctified are all of one: for which cause he is not ashamed to call them brethren,
If you don't want to be ashamed at the Lord's coming then you need to be sanctified. This discussion of salvation completely ignores sanctification as though it isn't important. Well if you want to be saved from being ashamed it is critical.
Hebrews 11:16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.
If you do not desire a better country then God will be ashamed of you.
1John 2:28 And now, little children, abide in him; that, when he shall appear, we may have confidence, and not be ashamed before him at his coming.
If you don't want to be ashamed at the Lord's coming you need to abide in Him.