What do you mean, a day wasn't worshipped? And no-one is arguing that you don't abide in Him every day. That isn't the issue. And it hasn't anything to do with Sabbath observance.
The work of the creator was finished, but the first week of time was not yet completed. Each of the six days had been distinguished by the Creator's work upon it; but the seventh was rendered memorable in a very different manner. "And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made." In yet stronger language it is written: "On the seventh day he rested, and was REFRESHED." Thus the seventh day of the week became the rest-day of the Lord. How remarkable is this fact! "The everlasting God, The Lord, the Creator of the ends of the earth, fainteth not, neither is weary." He needed no rest; yet it is written, "On the seventh day he rested, and was refreshed." Why does not the record simply state the cessation of the Creator's work? Why did he at the close of that work employ a day of rest? The answer will be learned from the next verse. He was laying the foundation of a divine institution, the memorial of his own great work. "And God blessed the seventh day, and sanctified it; because that in it he had rested from all his work which God created and made." The fourth commandment states the same fact: He "rested the seventh day; wherefore the Lord blessed the Sabbath day, and hallowed it." The blessing and sanctification of the seventh day were because that God had rested upon it. His resting upon it, then, was to lay the foundation for blessing and sanctifying the day. His being refreshed with this rest, implies that he delighted in the act which laid the foundation for the memorial of his great work. The second act of the Creator in instituting this memorial was to place his blessing upon the day of his rest. Thence forward it was the blessed rest-day of the Lord. A third act completes the sacred institution. The day already blessed of God is now, last of all, sanctified or hallowed by him. To sanctify is "to separate, set apart, or appoint to a holy, sacred, or religious use." To hallow is "to make holy; to consecrate; to set apart for a holy or religious use." The time when these three acts were performed is worthy of especial notice. The first act was that of rest. This took place on the seventh day; for the day was employed in rest. The second and third acts took place when the seventh day was past. "God blessed the seventh day and sanctified it: because that in it he had rested from all his work." Hence it was on the first day of the second week of time that God blessed the seventh day, and set it apart to a holy use. The blessing and sanctification of the seventh day, therefore, relate not to the first seventh day of time, but to the seventh day of the week for time to come, in memory of God's rest on that day from the work of creation. With the beginning of time, God began to count days, giving to each an ordinal number for its name. Seven different days receive as many different names. In memory of that which he did on the last of these days, he sets that apart by name to a holy use. This act gave existence to weeks, or periods of seven days. For with the seventh day, he ceased to count, and, by the divine appointment of that day to a holy use in memory of his rest thereon, he causes man to begin the count of a new week so soon as the first seventh day had ceased. And as God has been pleased to give man, in all, but seven different days, and has given to each one of these days a name which indicates its exact place in the week, his act of setting apart one of these by name, which act created weeks and gave man the Sabbath, can never - except by sophistry - be made to relate to an indefinite or uncertain day. The days of the week are measured off by revolution of our earth on its axis; and hence our seventh day, as such, can come only to dwellers on this globe. To Adam and Eve, therefore, as inhabitants of this earth, and not to the inhabitants of some other world, were the days of the week given to use. Hence, when God set apart one of these days to a holy use in memory of his own rest on that day of the week, the very essence of the act consisted in his telling Adam that this day should be used only for sacred purposes. Adam was then in the garden of God, placed there by the Creator to dress it and to keep it. He was also commissioned of God to subdue the earth. When therefore the rest-day of the Lord should return, from week to week, all this secular employment, however proper in itself, must be laid aside, and the day observed in memory of the Creator's rest.
Dr. Twisse quotes Martin Luther thus: "And Martin Luther professeth as much (tome vi, in Gen.2:3). `It follows from hence,' saith he, `that, if Adam had stood in his innocency, yet he should have kept the seventh day holy, that is, on that day he should have taught his children, and children's children, what was the will of God, and wherein his worship did consist; he should have praised God, given thanks, and offered. On other days he should have tilled his ground, looked to his cattle.' " The Hebrew verb, kadash, here rendered sanctified, and in the fourth commandment rendered hallowed, is defined by Gesenius, "To pronounce holy, to sanctify; to institute any holy thing, to appoint." It is repeatedly used in the Old Testament for a public appointment or proclamation. Thus, when the cities of refuge were set apart in Israel, it is written: "They appointed [margin, Heb., sanctified] Kedesh in Galilee in Mount Naphtali, and Shechem in Mount Ephraim," &c. This sanctification or appointment of the cities of refuge was by a public announcement to Israel that these cities were set apart for that purpose. This verb is also used for the appointment of a public fast, and for the gathering of a solemn assembly. Thus it is written: "Sanctify [i.e., appoint] ye a fast, call a solemn assembly, gather the elders and all the inhabitants of the land into the house of the Lord your God." "Blow the trumpet in Zion, sanctify [i.e., appoint] a fast, call a solemn assembly." "And Jehu said, Proclaim [margin, Heb., sanctify] a solemn assembly for Baal." This appointment for Baal was so public that all the worshipers of Baal in all Israel were gathered together. These fasts and solemn assemblies were sanctified or set apart by a public appointment or proclamation of the fact. When therefore God set apart the seventh day to a holy use, it was necessary that he should state that fact to those who had the days of the week to use. Without such announcement the day could not be set apart from the others. But the most striking illustration of the meaning of this word may be found in the record of the sanctification of Mount Sinai. When God was about to speak the ten commandments in the hearing of all Israel, he sent Moses down from the top of Mount Sinai to restrain the people from touching the mount. "And Moses said unto the Lord, The people cannot come up to Mount Sinai; for thou chargedst us, saying, Set bounds about the mount, and sanctify it." Turning back to the verse where God gave this charge to Moses, we read: "And thou shalt set bounds unto the people round about, saying, Take heed to yourselves, that ye go not up into the mount or touch the border of it." Hence to sanctify the mount was to command the people not to touch even the border of it; for God was about to descend in majesty upon it. In other words, to sanctify or set apart to a holy use Mount Sinai, was to tell the people that God would have them treat the mountain as sacred to himself. And thus also to sanctify the rest-day of the Lord was to tell Adam that he should treat the day as holy to the Lord. The declaration, "God blessed the seventh day, and sanctified it," is not indeed a commandment for the observance of that day; but it is the record that such a precept was given to Adam... For how could the Creator "set apart to a holy use" the day of his rest, when those who were to use the day knew nothing of his will in the case? Let those answer who are able.