Yahshua said the two greatest commandments were to love Yahweh with all your heart . . . So if love of Yahweh and our neighbors is the framework upon which all the law and prophets hang, then love is the underlying reason for every prophecy, every law, every commandment, etc. Every bit of instruction ever issued by Yahweh has love as its motivational beginning, including the Sabbath. Obedience to the Sabbath is not only an expression of love towards our Heavenly Father, but His giving of the Sabbath to man is an expression of love and mercy towards man. In His mercy and love towards us, He knew man would need a day of rest.
Mercy is also one of the greatest expressions of love and morality.
Since mercy and love are intrinsically tied into the Sabbath, Yahweh included it among the other nine commandments which are rightly called 'Yahweh's moral law'. Let every man be fully persuaded in his own mind. There is nothing wrong with esteeming every day, after all, Yahweh made them all. However, that does not change the fact that as we worship Him every day we must also rest from labor on one day, the Sabbath. It is a mistake to read the Sabbath into this verse.