As I do history of the spread of Christianity I realize more and more how essential 2 things are that all Christians hold in common. They were so important that Abp. Thomas Cranmer said England had officially reformed as a country when the people had learned these 2 things in English/Vernacular.
The Creed, and the Lord's Prayer
It's interesting to me that Abp Rowan Williams 400 years later has agreed that these are the centerpiece of the Christian faith. I'd like to make them more important in my life.