本書為教理講授的工具書，為教理課程以及渴望更了解基督信仰基本神學概念的人服務。本書不以傳統解釋信理的模式，即從上、從天主聖三的奧祕講起；反而從較簡單、以人眼所能見的，即耶穌這個人，祂的教導、死亡和復活說起，漸至肉眼未能見的神聖世界。內容雖在討論難以了解的神學性議題，卻以淺顯易懂的文筆呈現，使一般讀者均能一目了然。長期的堂區牧職經驗，使作者將神學知識，以深入淺出的方式，具體運用於牧靈需要。

Introduction to the book

This book is meant to be an instrument at the service of catechesis, both for those who give catechism classes and for those who wish to know more about the basic theological notions of the Christian faith. Instead of following the traditional way of explaining the Creed, which means starting from the top, the mystery of the Trinity, it goes through the simpler path of what was humanly seen, that is Jesus, his teaching, death, and resurrection, to come to talk about the divine realities that one cannot see. Although it deals with some difficult theological issues, overall it uses a simple language, comprehensible by non-specialized people. The long pastoral experience of the author provided the necessary understanding to put theological knowledge at the service of pastoral concrete needs.