Does the Church in general need to revisit and revise its strategy in maintaining the faith? Is it a high time that we need to impart the young Christians (children) a comprehensive knowledge of all the doctrines of Christianity, or do we tend to raise them as unconvinced Christians susceptible to falter in their faith?
When a child with an analyzing mind is made to follow a Christian religion but is not made aware of the profound facts about the various beliefs/doctrines of the religion during the catechism classes, he tends to become an unconvinced Christian. When he starts seeking answers to these unconvinced claims from whichever source he finds, he is faced with answers, which sometimes are diametrically opposite to each other, answers that are in confirmation of his belief as well as against it. In absence of right guidance at the time of his growth, some of these young Christians end up in accepting those answers are against the Christian teachings.
Does the Church in general need to revisit and revise its strategy of adapting to the changed world and change the techniques, to ensure the maintenance of the faith in economically advanced countries?
In considering the causes of the lack of in-depth doctrinal and apologetic instruction provided to Christian youth, we might do well to consider the extent to which many, if not the majority of adults who self-identify as Christian are equally untaught.

Some of us are called to in-depth study of the bible; some of us are naturally drawn to a comprehensive study of world religions; some of us are fascinated by human nature, and see the study of religion as providing key historical insights into how the human mind and personality work.

I suspect, however, that the majority of people around the world see the pursuit of entertainment as a more effective use of their spare time, as a way to relax from the stress of life. Add the fact that religious study is -- as with study of most topics -- necessarily academic, and regarded by many as "dry," "stuffy," and even "boring," and one can see how religious study can only be "exciting" to those with a particular way of looking at the world.

This is not to provide an excuse for lack of religious ferver, but simply to acknowledge what, to one way of thinking, is the actual state of things for many.

With reference specifically to Christianity, many would agree heartily with criticism of the instructional methods, or lack thereof, used in many denominations. For example, critical analysis of what is often called the "emergent/emerging church movement" will sometimes describe lack of effective religious instruction as a causal factor in the formation of many of the beliefs espoused by some within the "movement."

All of that being said, I know of no effective ways of resolving the situation. The lack of effective religious instruction of youth can be traced to the lack of effective religious understand in many adults, and is the lack of effective religious understanding in many adults a symptom of anything other than tepid faith -- that is, one that does not present an overwhelming desire to know God, and to love God with all of one's heart, soul, strength, and mind? Exhortation to a more consuming faith, as an attempt to counter lack of religious ferver, is, after all, among the central topics addressed in scripture.