Engaging someone to understand a spiritual truth does not seem to be prohibited, but rather encouraged. But using it as a way to focus on and discuss sports, for example would not because the substance is not valid for the focus of the sabbath
Ok, like I said in my identical thread to Andrews, I almost get it if the only postings were ONLY on Doctrine (which not all are) but I also see it as something that we do daily so shouldn't we not post to Facebook and the PB on the sabbath at all by that line of setting the day apart unlike the rest of the week?
I see this thread has come through a lot of twists and turns, so please forgive me if I'm not addressing this based on past context.
It is a difficult thing in a context like this where spontaneous discussion can certainly wander at any time, but particularly on the sabbath where we are commanded to "cease" and "set apart." I'm thankful we have moderators who take this seriously, difficult and imperfect as observing this may be.
If I'm understanding some of the discussion that went on earlier on this topic, it might be helpful to understand that "fellowship" in and of itself is not a basis for keeping the fourth commandment. So, the fact that one may need and desire "fellowship" with Christians does not mean that they may think about, talk about (let alone play) football on the Lord's Day in the context of "fellowship" and obey the fourth commandment.
Sinners that we all are, we very easily rationalize our disobedience.
And by virtue of the remnant of the fallen nature that is still in us, we are not in that at all willing to suffer any inconvenience in order to obey and please our God.
The "remembrance" part of the sabbath is quickly blotted out when the focus goes to the ordinary activities of recreation, entertainment, amusement that are fine on the other days- God generously gives time for them then but calls us to "break" that pattern, to "cease" and come apart from them toward Him in a way not possible the other days of the week.
While we cannot ever base scriptural truth on a practical basis, I can only observe that our neurotic preoccupation with work, money and entertaining ourselves every minute of every day is a reason there is so much distress in our generation. It can even affect one's health.
God calls explicitly, and by His example at Creation to break this pattern, one day in seven. He blesses those who do.
Let me also add, if I'm following the specific applications here, I don't think the technology itself (e.g. Facebook, Twitter, Puritan Board) automatically violates the fourth commandment, but it is their substance. If they are a means to understanding a passage of Scripture better, for example, they can be useful even on the Lord's Day. If they are a means to prideful argumentation about our rights to focus on entertaining ourselves around a super sporting event, they are not.
There certainly can be a lot of distractions on all these media, and wisdom must be applied, weaknesses understood and prayed for, but that does not in itself render them wrong.