Video from Zondervan
"The Reformers did not see themselves breaking with the past as much as they saw themselves reforming that past in the light of God’s Word. The Reformers and their Catholic opponents disagreed on only a small number of topics—authority, sacraments, justification were the main ones. For example, on the doctrine of God, the Trinity, the incarnation, and even predestination, there’s very little disagreement between the Reformers and their Catholic predecessors. Thus, the Reformation is narrow. It resulted in large changes among a small number of doctrines with big institutional, social, cultural, and political implications. But the Reformation was not the wide-ranging theological break that many Protestants think it was." from video introduction.