De Facto Creed: What would yours look like?

Many churches confess the Nicene Creed, the only creed ever to be agreed upon in an ecumenical council. Yet most of those churches are not in fellowship. Consider this portion of the creed: "We believe in one holy catholic and apostolic church." While the majority of Christian confess this, there are a few different takes on what it means. It seems to me the de facto creed of churches like mine (Lutheran) has something between the lines:

We believe in one holy catholic and apostolic church;
what we received from the apostles we pass along,
neither adding nor taking away.

That is probably close to our de facto creed, that the church and her mission is bound closely and uniquely to the original teaching of Jesus' apostles as their witness to him. Sola Scriptura, to a Lutheran, is the practical working out of the view that the apostolic church has apostolic teachings. Scripture is seen as the deposit of teachings that came from the apostles and therefore the guarantor of apostolic faith.

I hope one of the Roman Catholics will chime in with their comments on what their de facto creed would look like. As best I can tell, it would look more like this:

We believe in one holy catholic and apostolic church,
Infallible bulwark against which the gates of hell cannot prevail,
Whose authority is the Bishop of Rome.

I hope I've done that view justice, and again would be glad to hear from the Roman Catholics around.

What about your church? When it comes to what we confess together and the differences that separate us, what is your de facto creed?