Scripture-Rooted Foundation

Even the sixteenth-century Protestant Reformers, especially magisterial men like Martin Luther and John Calvin, understood that there was an established historical foundation deeply rooted in the Scripture.  The creeds and the doctrines taught by a consensus of the early church fathers were continually appealed to by all the great Protestant Reformers.  For them, common faith was expressed in the earliest ecumenical creeds.

Source: John Armstrong  -  Your Church is Too Small, p. 19