The church has deliberately not worshiped on the Sabbath for 19 centuries. Today we have forgotten the reason for this tradition, but the early church knew. They we’re recognizing that God had done away with the old system, the law, and brought in something brand-new: a New Covenant, a new arrangement between God and man where time and place of worship no longer mattered. Every day is a day of Sabbath rest for those who are united with Christ Jesus.
Classic Christianity, Harvest House, 1989, 121.