Cardinal Ratzinger on the Four Parts of the Catechism

I just came across this reference by Cardinal Ratzinger on the four parts that the Catechism of the Catholic Church is divided into (Profession of Faith (The Creed), The Celebration of the Christian Mystery (Liturgy), Life in Christ (Ten Commandments), and Christian Prayer). This quote is little challenging. I thought it was especially interesting because it shows the connections between this "new" Catechism and Church tradition.

The quote is from Handing on the Faith in an Age of Disbelief (written in 1983 - about ten years before the new Catechism was published):

...in the earliest period a catechetical structure developed that at its core goes back to the origins of the Church, a structure as old as or even older than the canon of biblical writings. Luther used this structure for his catechism, taking it for granted just as the authors of the Roman Catechism [a.k.a. The Catechism of the Council of Trent] did. This was possible because it was a question, not of an artificial system, but of a simple arrangement of the requisited memorized material of the faith, which at the same time mirrors the elements of the Church's life: the Apostles' Creed, the sacraments, the Ten Commandments and the Lord's Prayer. These four classical "principal divisions" of catechesis have sufficed over the centuries as organizational subdivisions and collecting points for catechetical instruction...

We have just said that they correspond to the dimensions of Christian life; the Roman Catechism spells this out when it says that it presents what the Christian must belief (Creed), what he must hope (Our Father), and what he must do (the Ten Commandments as an interpretation of the greatest Commandment and that it also defines the environment in which all of this is anchored (sacrament and Church).