Sorry Post, I did not understand your answer
the Christian is not under the law. see Romans 1-8 & basically all of Galatians & Hebrews.
the term "the law" specifically includes the 10 commandments - they are not separate from the law. see Romans 7:7
do i keep sabbath, yes -- what semblance i can. the law demands certain sabbath-specific sacrifices in the temple and there being no temple there can be no absolute sabbath keeping. the one under "the law" is sorely disgraced, irreconcilably, because the law requires temple services and visitation during the feast.
so in truth does anyone "keep sabbath" according to the law?
no. impossible.
yes i try to keep sabbath. i set aside saturdays and do no work other than what anyone asks of me. if my employer asks of me, i make myself his servant, as our Lord did for us. if anyone asks me to go a mile on sabbath, i go two. this is rest. i rest in Christ, in Whom are all my streams, from Whom all of my life flows, without Whom i am nothing. i have absolute rest; i am not under condemnation of the law or of anything else, but have passed from death to life by His grace, through faith: faith in Him, in His faithfulness towards me, in His work.
do i keep sabbath because i think it is required.
no. it is not.
all that is required is faith, which is concurrent with repentance, which the answer of God towards is renewal, which produces works, which no one but God is able to judge if they exist or not.
i keep sabbath because i remember it is God who sanctifies me - has sanctified me, with one perfect sacrifice. see Hebrews 10. it is my gift of worship to Him, freely given, uncoerced, undemanded. not of law, which is not of faith, therefore is sin - but of love. see Romans 14:23 & Galatians 3:12
do i have any doubt about my salvation? no.
do i obey the commandments in Colossians 2? yes.
i will adamantly, scripturally, completely oppose anyone who seeks to judge me or other believers on the basis of feasts, foods, new moons or sabbaths. with the strength of God, Who is invincible.
the accuser of the brethren is Satan.
those who accuse the saints are partner with him, doing his will.