It is most interesting to note that in God’s reprimanding the fasting that was apparently popularly done in Isa 58:4-5, it manifestly had started out as something spontaneous by the people and also commendable, and evidently it was the fasting on the Sabbath Day itself that was the most commendable, while the other fasting instances were more self-centered, contentious and wrongly motivated. However God did not at all require fasting on the Sabbath day. And as documentedly related here (full book) by Samuele Bacchiocchi, by the first centuries A.D., the Jewish people were categorically against fasting on the weekly Sabbath, so it was something “special” for those Jews in Isaiah’s day to do so. However God greatly objected to the way in which it all had become perverted from its initial good/commendable intentions and in Isa 58:6-7 He literally “scrapped” that whole human-‘chosen’ idea/practice of fasting on the Sabbath, which, while perverted, they still thought was “acceptable” to God, by pointing out what “self-denial” He actually found most commendable and required for His Sabbath.
Most surprisingly, early Christians, (as reported by Aristides of Athens in ca. 125 A.D. in a ‘Defense of Christianity’ of his to the Roman Emperor Hadrian), evidently still under the “inspiration” of the Apostolic Church in Acts 2:42-45; 4:32-35; 2 Cor 8:7-15, made the most Godly application of God’s expressed desire/will of Isa 58:6-7 by ‘customarily (some say ‘as a law’) practising’ the following:
Indeed, as stated in the Sabbath Commandment in Exod 20:8-11 & Deut 5:12-15, God intended to provided rest to everyone who needed/desired it (cf. Lev 25:35ff), and that rightly came to include those who had been striving all week long for the very basics of life. That is why this principle of ‘providing temporal, sustenance rest for the needy’ is incorporated in His Sabbatical Laws (e.g., Exod 23:10-12; Lev 25:1-22); also spiritual rest in Annual Sabbaths (Feasts); and the ultimate rest in the Millennium (cf. EW 286.1).
#9 - Claiming to represent Christ, and being His witness, while knowingly doing things that are in complete contradiction to His will and ways, is, and can only be, a “bearing of false witness to Jesus Christ.” Such lying, false witnesses will definitely not be the people who Jesus will have represent Him in the end (Rev 14:3-5).
Therefore, from simply this brief overview on the topic of the “Sealing of God’s People and the Sabbath,” it can be seen that Benevolence has an undeniable part to play in it, if not, the most important part. It is therefore in this light that the Seal of God must be fully, and properly, understood.
* (See the excellent, Nature-based, corroborating presentation, entitled “Co-dependence - the unselfish planet”, by Walter Veith here|here).
 Cf. in this sermon on the 8th Commandment by David Asscherick [14:38-30:03ff].
 See the statement against the Capitalistic Spirit and its preyed upon ‘“fear” of money’ by Jonathan Henderson in his 11-19-11 sermon [mp4] “Beyond Elementary: Giving” 26:09-40:20ff ; also here. Cf. also his 10-26-13 sermon [mp4] pointedly addressing “greed”.).
 See a foundationally similar exposition to this deeper view of God’s endtime seal in this NZYC 2013 sermon by Adrian Webster.