There are learned folks who go about explaining the meaning of theology or religious principles. These will write things like Apologetics articles, some more important documents that come out of an eternal debate between religions and within religions. Christians started the trend, and it has become a historical process.
Any type of explanation or enlightenment about any precept in Christianity is part of apologetics. While the term may sound too much about folks trying to apologize, this may be part of a debate too. Since apologies is typically a formal part of a process of trying to get a message across to a wider audience.
This is a pardoner kind of thing, begging pardon and trying to interest the attention of an audience. The relevant audiences are also expecting this process to be an enlightening one, and so accept the documents given with grace. Many writers tend to be really religious although there are also the occasional non religious person.
For instance, one atheist can suddenly discover something that is relevant to the process of Christian progress. He or she has every right to publish an article in this line. She or he may not expect to heard but there are lots of forums for writing of this kind out there, no matter how many think that religions are not too relevant anymore.
This is the opposite of realities on the ground in fact. Most of the folks on this planet are subscribers to one religion or another, which means that they will now typically what the beliefs for any particular faith is all about. They also will be familiar with apologetics not as formally designated but according to how their faith deals with it.
It is often something that takes out the sting of some onus that faith has given on occasion and practice. That means that there is lots of diplomacy involved here, not only for writers themselves but those who receive the good news. And most of these are considered good news of the kind that is badly needed anywhere.
For Christians there is need too to access materials from other faiths. This might be any kind of writing that tries to explain the basic tenets and the fundamental beliefs of any kind of religious worship. All of these materials are also found online as well as the libraries of churches or schools.
The online items are just about on par with the better libraries. They also offer more stuff that are contained in blogs and other sites which feature authors and authorities. Needless to say a lot of the faithful have followed technology into this age of instantly available source materials for all who are interested in any subject.
Also you could have such materials as part of the referencing you might want to use for your own article. This is the type of writing that needs real time references so that you can argue or lay down your points well. Often, there are lots of legal items concerned, because a lot of principles involved will apply to the lives of believers.