1 John 1:9 KJV VS. Colossians 2:13 KJV
What happened to those in the Body of Christ who did not judge themselves in regard to their sins?:
"For if we would judge ourselves, we should not be judged. But when we are judged, we are chastened of the Lord, that we should not be condemned with the world" (1 Cor.11:31032).
Of course the chastening spoken of there refers to our sins. But if we confess our sins (judge ourselves) then will will not be chastened for our sins.
1 John 2:20 KJV, 27 VS. Ephesians 4:11-16 KJV, 2 Timothy 2:15 KJV
You overlook what those in the Body are told here:
"But he that is spiritual judgeth all things, yet he himself is judged of no man. For who hath known the mind of the Lord, that he may instruct him? but we have the mind of Christ" (1 Cor.2:15-16).
Those who received the Jewish epistles were waiting for the rapture and only those in the Body of Christ will be caught up to meet the Lord in the air:
"Beloved, now are we the children of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is" (1 Jn.3:2).
Those words of John speak of the "appearance" of the Lord Jesus and at that time he says that "we shall be like Him." That is the same "appearance" which Paul refers to here:
"When Christ, who is our life, shall appear, then shall ye also appear with him in glory" (Col.3:4).
Those in the Body of Christ will "appear with Him in glory" because they will put on a new, glorious body just like the Lord's glorious body:
"For our citizenship is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ: Who shall change our lowly body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself" (Phil.3:20-21).
In the following passage from another Hebrew epistle Peter is speaking of the exact same thing:
"The elders which are among you I exhort, who am also an elder, and a witness of the sufferings of Christ, and also a partaker of the glory that shall be revealed...And when the chief Shepherd shall appear, ye shall receive a crown of glory that fadeth not away" (1 Pet.5:1,4).