A problem that I experienced upon becoming a Christian, is that the standard model over the centuries is first to discover the true institutional manifestation of Christianity: then believe it, obey it.
The flip side of this standard model; is that a good Christian does not make up his own mind; because the major issues have already been settled, long ago, by wiser and holier persons.
The good Christian's job is to discover these already-known truths, then believe and obey them.
Yet, in our civilization; when it comes to questions of Which religion? Which church? - and Which party or person to believe to believe and obey among the factions within any church - choice is inescapable.
Literally inescapable. The most traditional and orthodox of Christians inescapably choose to be Christian, choose what kind of Christian to be, choose which particular church institution; and within that church institution they must choose between rival and contradictory claims concerning significant matters.
Every church-based Christian actually has-made these choices, and continues to make them.
He cannot believe and obey until after he personally has decided who to believe and obey.
This is a contradiction; because by a traditional model the good Christian is not supposed to be choosing who to believe and obey.
However, this contradiction is exactly what all modern Western traditionalists have already done and continue doing.
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Note added. The above argument is based on the logic and facts of the situation, and is generic in scope. But the psychological element is also relevant.
When I became a Christian, I followed the standard model of conversion and practice outlined here. Therefore; once I had decided that Christianity was true; I then sought a denomination, and a church. However; I rapidly found that my first choice of a church was so corrupted with respect to the priority given to major issues of the day, that it seemed obviously harmful to take the approved attitude of belief and obedience.
I therefore sought an uncorrupted church; and the search eventually expanded to include Protestant and Catholic (Western and Eastern), as well as Mormon. But even when I made a "firm" choice of a church towards which I intended to B and O; it became rapidly apparent that "the" church was not of one mind - but instead riven by fundamental division on core issues of validity.
...Such that yet more choosing would be required. Until, in the end, it struck me that I was compelled to do so much personal discerning and picking - which never seemed to stop, that it reduced to absurdity the notion that belief and obedience to external-authority ought-to-be primary.
After all, if we are subjectively picking the authority to which we will submit; then how can we then regard that self-picked authority as objectively valid?
But there are other individuals who have, nonetheless, decided that the B&O attitude to whatever sub-institution has survived this selective process is the one-and-only valid form of Christianity. Even after themselves having been-through so much, and continuing, discerning - they have convinced themselves that their choice of an authority is objective and with universal validity; such that an attitude of humility and submission is necessarily due to this picked-authority.
Such a process of choice and its denial seems to result in a vociferous and hyper-aggressive attitude when asserting their "final" choices! My interpretation is that this noisy dogmatism is transparently understandable on a psychological basis, as a form of compensation; whereby such individuals are refusing to acknowledge or defend the non-objective nature of their their own religious incoherence; by a combination of starkly denying any problem, creating abstract models of the unity, and concluding the objectivity of their church's teaching and authority...
In the end, such "traditionalists" have manufactured a quasi-Medieval fantasy of tradition, rooted in what they personally suppose their church ought-to-be; rather than what it is. So that an attitude of obedient belief and practice against becomes possible, and natural.
In short, the "Christian Crusader" pose is an act; intended by the pseudo-traditionalists to distract themselves, as well as others, from the fatal knowledge that they are indeed... acting.

