The "letter" is something you can only do through knowledge of the rule, just like circumcision on the 8th day. It isn't a natural reaction from your conscience of right and wrong.
John Bunyan actually wrote a book about this when he was in prison. His work as a missionary to his fellow inmates convinced him of the same thing: That Sabbath-keeping was not a natural manifestation of the Spirit of God. He forgot two little other things: Civilization and cultural conditioning. I've been on mission trips. There are no "natural reactions from conscience of right and wrong." Total depravity, you know.
The further you go into the recesses of remote and detached human society, the less and less you see of these "natural reactions from conscience." When they do occur under these circumstances, it is usually the product of a bona fide miracle. I have literally met folks who were dressed like me and had no understanding of property rights and honesty, much less the baser crimes against God, like adultery and idolatry. Respect for parents is an alien concept in many third-world countries. I saw these things to some degree when I was growing up on Guam.
In short, no virtue is a manifestation of the Spirit of God without the cooperation of His Word
(however indirect it may be).
What Bunyan didn't realize was that these souls to whom he was ministering came from slums of large cities where the right thing to do was only discernible by the standards set by their friends, family, and peers, what little religious training they had, and from the civil authorities (often by trial and error). They might have had some knowledge of weekly rest, but it was likely not experiential at all, and since the prisons at that time weren't too big on civil rights, the weekly cycle was probably little more than a faint memory or a blur to them.
Also, when newly-converted Christians are experiencing their first love for Christ, especially under these circumstances, they're more attuned to the two great commandments than anything else. So it's not at all surprising that they gave little or no thought to one of the more detailed commandments of the Decalogue (especially the one that God knew was most likely to be forgotten and, therefore, started with the word "Remember"). At first, Bunyan waited for one of them to bring up the Sabbath matter (probably because he knew it would be troublesome in a prison environment, anyway). It never happened. He thus reached his unfortunate conclusion.
Dear, dear 1CL, I hear you about not being able to wrap my head around all the things I read on this forum
(and other places) about the Spiritual Sabbath.
Notice I am careful not to single out your posts or ascribe motive to you or anyone else, for that matter. I say this not to seek to be seen as extremely humble
(for I truly am not), but I think it is important to state one's intentions plainly at times, in an effort to try to minimize misunderstandings. I trust our friendship can bear my honesty and frankness in this matter, and here it is in sort of a nutshell:
When people tell me that I am misguided about obedience and that I should re-evaluate and be enlightened and indwelt by the Spirit (assuming that I'm not at this point
),
I hear the echoes of a scene from the Eden paradise and the counterfeit wisdom there offered:
"Hath God said you should not eat of every tree of the Garden?"
("Hath God said you should not work on every day of the week, and keep them all holy?")
"We may eat of every tree in the garden, except the tree in the midst of it."
("We may work on every day, except the seventh day--it is holy to the LORD.")
"He knows that in the day you eat thereof--disobey--you shall become as Gods, knowing good and evil."
("He knows that in the day you give up this literal Sabbath-keeping--disobey--and embrace the Spirit of the law, you shall truly be able to know good and evil.")
So, you see, I am of the mind that the devil switches up his tactics, but he's always after the same thing: to get people severed from their connection with God by luring them into disobedience
(see note below).
Can you see how this would be an awfully hard sell for me?
(Note: I do not believe that people slip into and out of a "saved" state as often as they have a bite to eat. In fact, I don't believe in the "saved state" at all in the way it is commonly portrayed today. I'll probably be sorry I brought that up. ;))