Jesus made it clear that the seventh day was made for mankind. (Mark 2:27-28) (v.27) And he said unto them, The Sabbath was made for man, and not man for the Sabbath: Do we understand that, the Sabbath was made for us, not us for the Sabbath. (v.28) Therefore the Son of man is Lord also of the Sabbath. The Son of man (Jesus) is the Lord God of the seventh day Sabbath (Saturday). (Ex.31:16-17) (v.16) Wherefore the children of Israel shall keep the Sabbath, to observe the Sabbath throughout their generations, for a perpetual covenant. (v.17) It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed. You see that the Sabbath day is a sign between God and His people forever. Israel was His people then and whoever chooses to obey Him now are His people.
Let take a look at those who choose to be with the lord and obey him. Let’s go into Isaiah 56: 1 Thus saith the LORD, Keep ye judgment, and do justice: for my salvation is near to come, and my righteousness to be revealed. 2 Blessed is the man that doeth this, and the son of man that layeth hold on it; that keepeth the sabbath from polluting it, and keepeth his hand from doing any evil. 3 Neither let the son of the stranger, that hath joined himself to the LORD, speak, saying, The LORD hath utterly separated me from his people: neither let the eunuch say, Behold, I am a dry tree. 4For thus saith the LORD unto the eunuchs that keep my sabbaths, and choose the things that please me, and take hold of my covenant; 6 Also the sons of the stranger, that join themselves to the LORD, to serve him, and to love the name of the LORD, to be his servants, every one that keepeth the sabbath from polluting it, and taketh hold of my covenant; 7 even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar; for mine house shall be called an house of prayer for all people.
God intended for the weekly Sabbath (this word means rest in Hebrew) to be a refreshing blessing for mankind. God knew that human beings would need periodic rest and change from work. But the purpose for keeping God's Sabbath goes far beyond simply resting on that day. We need that time each week to have close spiritual contact with God through prayer, bible study and fellowship with other believers. The Sabbath day is a blessing.