In and Out of Sin

"So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first cast a stone at her." John 8:7, and "For all have sinned, and come short of the glory of God;" Rom 3:23.
These are scriptures being used today (ignorantly) in disarming and rendering defenseless the body of Christ- the Church.It's a deception! They proclaim that we are all sinners and so both the believers in Christ and the world are on same plain.This is not true!For "... if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new." 2 Cor 5:17. For being in Christ,we are new creatures,and should Never be compared with them that are without in the world.

"There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit. For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death. For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:..." Rom 8:1-3[pls read till verse 8].

Christ "condemned sin in the flesh:..".He conquered sin in the flesh!Therefore, to "be in Christ" as "a new creature" is to be "without" sin.
Believers are by default sinless.Sin does not have authority over Christ and all that are in Him.Through deception,lusts,etc sin could creep in,but once it's acknowledged and dealt with,we are restored instantly to the sinless state.
The unbelievers are living in sin and are by default sinful.For "...by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:" Rom 5:12. 
So please let us avoid this "common" grouping's being taught today, for we must be actively"Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;" 2Cor 10:5.