Here is an interesting quote to ponder with regard to the Sabbath:
The first Christians would never have treated the Sabbath as a shadow of the past—as indeed they did—unless they had first grasped the significance of Jesus’ teaching in this connection.
—D.A. Carson, “Jesus and the Sabbath in the Four Gospels,” in From Sabbath to Lord’s Day, p. 85.
You can read the 21-page essay free online, if you want to consider and understand the arguments for this position.