The Third Commandment requires us to keep holy the Lord’s Day. Scripture tells us the Lord rested on the seventh day. This was not because He was tired, but rather because He was foretelling the Sabbath Day that Jesus would rest in the tomb after His work of offering the sacrifice of His Passion and death. On that day the Lord preached to the dead and bid them to leave the place of death and to come with Him into life eternal.
Keeping holy the Lord ’s Day, then, reminds us that God is on the side of human life. It also reminds us that He is Lord of life. All our activities and choices are under Him, which is why we pause on the Lord’s Day to worship Him in Church.