The Catechism of the Catholic Church is a fantastic resource for exploring the Catholic faith or looking up points of doctrine. It is a treasure trove of Sacred Scripture and all its elements together reveal the mystery and life of the Church and the rich tapestry of the Church founded by Christ. It is divided into four sections or pillars:
1) The Creed which reveals what she received in the form of revelation and believes.
2) The Liturgy, which draws into God's life and enlivens us with His grace.
3) Life in Christ which gives the right "orientation of human action in relation to God and others.
4) Prayer which is a way of life for Christians and deepens our relationship with the Father, Son and Holy Spirit in the three persons of the one God.
Catechism of the Catholic Church