Pope Benedict today interrupts his Wednesday catechetical series on prayer for a year of faith series on the Creed stating that it is in the Creed that we find the essence (source and meaning) of the faith. That is why, he says, Blessed Pope John Paul II structured the Catechism of the Catholic Church within the framework of the Creed.
In this context it is interesting to note that one of Ratizinger's early books, one of his rare treatises, Introduction to Christianity is an modern explanation on the Creed. It would be worth while to read that book alongside the upcoming Wednesday audiences.
By the way, that work has three introductions written by the author, Summer 1968, September 1969 (tenth edition) and 2000.