When to Start Indoctrination

In a previous article we said a few things about the means, the 'how' of indoctrination. In our present article we plan to say a little about the 'when' of the indoctrination. When must the Church start with this; how old should the child be? I fully realize that the field I am treading upon is so large that I will not be able to finish this subject. It deals with the whole system of our catechetical training. A great many questions enter in. It would indeed be a proper subject for a more...