Christianity FAQ: Straight Answers, Tradition Named

On the core claims formalized in the Nicene Creed — one God in three persons, the incarnation and resurrection of Christ, the coming judgment — most historic Christian traditions agree. Beyond that, Catholic, Orthodox, and the many Protestant traditions differ on questions like the authority of the Pope, the number and meaning of the sacraments, and how salvation works, sometimes sharply.

Catholic tradition holds that the Pope has final teaching authority and that both Scripture and Church tradition carry authority; most Protestant traditions hold Scripture alone ("sola scriptura") as the final authority and reject the Pope's authority over them. The traditions also differ on the number of sacraments, the nature of the Eucharist, and the role of saints and Mary.

Catholic and Eastern Orthodox Christianity share ancient roots and split formally in the Great Schism of 1054, largely over the authority of the Pope over the whole Church and a theological dispute over the wording of the Nicene Creed (the "filioque" clause). Orthodox churches are organized as autocephalous (self-governing) national churches rather than under one central authority.

It's a collection of separate texts — 66 books in most Protestant Bibles, more in Catholic and Orthodox Bibles, which include additional books often called the deuterocanon or Apocrypha — written across roughly a thousand years by many different authors, later gathered into what's called a canon.

The Old Testament canon largely follows the Hebrew Bible; the New Testament canon took shape over the first few centuries of the Church through a combination of widespread early use and formal recognition at regional councils. Catholic and Orthodox Bibles include some additional Old Testament books that most Protestant traditions, following the Reformation-era return to the Hebrew canon, do not.

Catholic and Orthodox teaching hold regular worship attendance (Catholic teaching specifies Sunday Mass) as an obligation of the faith. Most Protestant traditions strongly encourage but don't formally mandate attendance, treating it as a normal expression of a life of faith rather than a rule with a penalty attached.

Most historic traditions teach some form of resurrection and final judgment, plus an intermediate state. Catholic teaching includes purgatory as a state of purification; Orthodox tradition holds a related but less formally defined view; most Protestant traditions reject purgatory and teach a more direct outcome. Specifics of heaven and hell are debated even within traditions.

Historically and today, Christians span the full range from young-earth creationism to full acceptance of evolutionary biology, often within the same denomination. Catholic and most mainline Protestant and Orthodox teaching officially accept evolutionary science as compatible with faith; some Protestant traditions, particularly in the U.S. evangelical stream, teach a literal six-day creation. There is no single Christian position.

It's a shared statement of core belief, written to settle specific fourth-century disputes about the nature of Christ, that Catholic, Orthodox, and many Protestant churches still recite together in worship. Reciting it is one of the few things that happens, in some form, across nearly the whole tradition.

Most Christian traditions teach that faith is meant to be lived in community, but views differ on whether church membership is required for salvation itself versus strongly recommended as part of a healthy faith. This is a genuinely contested question across traditions, not one with a single Christian answer.

Because Protestant tradition generally holds that Scripture, not a central authority, has final say, disagreements about how to read Scripture on a given question have tended to produce new denominations rather than being settled by one body. Estimates of the total number of Christian denominations worldwide vary widely by how narrowly "denomination" is defined, but scholarly estimates commonly run into the tens of thousands.

No. It describes what different Christian traditions teach and names which tradition holds which view. It does not argue that any one tradition is correct, and it is not affiliated with any church or denomination.