Carl Trueman is an historian by trade (do you like the Anglicisation in his honour there?). After a chapter on the contemporary impulses against the uses of creeds and confessions and another on the foundations for using them, he returns to his trade. In the 3rd and 4th chapters of The Creedal Imperative Trueman looks at the early church and the Reformation & post-Reformation period respectively to trace the development and use of creeds and confessions at those times.
In the 3rd chapter most of the time is spent looking at what are commonly called the “ecumenical councils” and the documents they produced. But the use and development of creeds and confessions didn’t start there. As he mentions in the 2nd chapter, the New Testament has an expectation for “forms of doctrine”. We see some of those forms in places like Romans 10, Philippians 2 and others. Trueman forgot to include the OT shema from Deuteronomy 6. There is a long history among God’s people of using confessions of faith, one that pre-dates the creeds of Christendom by over a 1,000 years.
In the early church, Trueman shows the development of “the rule”. A number of authors talk about a rule known to the audience of their letters. We see said mention in the letters of Ignatius, Tertullian, Irenaeus and others. This Rule typically functioned as the method for catechizing converts prior to their baptism. The “spontaneous baptisms” that thrill Mark Driscoll did not happen in the early church. People were catechized before, not after baptism (I’m sure their instruction didn’t cease, you get my point, maybe).
Trueman notes, based on a letter from Ambrose who was Bishop of Milan, that by 389 the Apostles’ Creed was not only in use but seemed to have been in use for some time. He enters into a very brief discussion about “descended into hell” to instruct us that we should not abandon or criticize a creed too quickly. It may not mean what we initially think it means. In other words, beware the knee jerk reaction. Knee jerk reactions typically produce bad theology.