The early church's use of tradition

With few exceptions, Christians in the early period saw Scripture and apostolic tradition as one great rule of truth. By the end of the early period it had become evident that there could be contradictory and competing traditions, sometimes with each position supported by widespread acceptance and long–standing practice. This caused a number of problems. Yet most Christians, supported by evidence or despite evidence, continued to believe that these disputes would be settled, through the guidance of the Holy Spirit in the life of the church, by careful appeal to the single source, which was Scripture and tradition. Scripture was sufficient, they believed, but only when interpreted properly.—Why Church History Matters, pages 41-42