Your statement is what causes you to void your faith in Him for why you are guiltless for profaning the sabbath day because Jesus is Lord of the sabbath and you are denying Him as Lord over you but the sabbath day is "lord" over you instead.
You have been proven by the KJV that you did not get the full message of Acts 15:14-21 KJV as reproving the need for the Gentiles to be circumcised and to keep the law of Moses as Moses was reading in ancient times what was still being read in Jewish synagogues in their day on the sabbath that Moses was preaching him as in preaching about God. That is why Jesus said...
John 5:39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me. 40 And ye will not come to me, that ye might have life.....
46 For had ye believed Moses, ye would have believed me; for he wrote of me. 47 But if ye believe not his writings, how shall ye believe my words? KJV
Are you using the NASB? They tend to use lawlessness a lot in place of iniquity in the KJV, but it can lose the message, especially about what that iniquity is. Example below in the KJV.
Matthew 7:13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: 14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
The iniquity is about broadening the way in coming to God the Father by when Jesus is the only way to come to God the Father for anything in prayer ( John 14:13-14 KJV ) , fellowship ( 1 Corinthians 1:9 KJV ), and especially worship ( John 13:31-32 KJV & Philippians 2:5-11 KJV ) as John 14:6 KJV confirms and so climbing up another way is how one is in iniquity as John 10:1 KJV confirms as those that do, gain tongues "for private use" for why they are following a stranger's voice.
They not only gain tongues without interpretation for private use but miracles happen for which they that profess Him claim they are doing in those apostate movements of the "Spirit" where believers fall backwards in confusion in. That is why Jesus identified them as workers of iniquity because that iniquity denies Him for why He is denying them and puts the emphasis of heeding His words as per Matthew 7:13-14 KJV to avoid falling when spirits come and for those who do not heed His words, they will fall when spirits comes.
Matthew 7:21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. 22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? 23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity. 24 Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock: 25 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock. 26 And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand: 27 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it. KJV
Do you see the rightly dividing the word of truth here in the KJV? Whereas the NASB uses the term lawlessness in Matthew 7:23 NASB and yet no body falls backwards breaking the laws. Compare the 2 readings at Bible Gateway.
Matthew 7:13-14,21-27 KJV VS NASB
You can see today what happens when believers approach God by way of the Holy Spirit in worship; and that is why they fall backwards because they did not heed His words that Jesus is the only way to come to God the Father by in worship or anything. So the iniquity is NOT going to the Son in coming to God the Father; that means going to the Holy Spirit in worship and prayer in order to come to God the Father by is the iniquity and why they are falling backwards.