In the Gospels, questions about the Sabbath center on how to keep it, not whether it should be kept. The way Jesus approached the Sabbath gives us an example.
The work required on the Sabbath is to prepare for the Kingdom of God, fellowshipping with our brethren, serving where possible, and relieving burdens.
Jesus magnified the Sabbath, giving principles by which to judge our activities. Each time Jesus taught about the Sabbath, He emphasized some form of redemption.
God gave the Sabbath to His people so they can know Him intimately. Idolatry, scattering, and captivity are the natural consequences of Sabbath-breaking.
We need to develop righteous judgment about what constitutes a genuine Sabbath emergency and what may be a deceptive rationalization of our human nature.
The Sabbath reminds us that God is Creator and that we were once in slavery to sin. The Sabbath is a time of blessing, deliverance, liberty, and redemption.
How and why a person keeps the Sabbath determines whether this test commandment is really a sign between God and His people or an act of futility.