Theory is always and necessarily a simplified model of reality. Extremely simplified - because everything in the universe is left-out, except what is specifically included in the theory.
If you think about it, this must be the case - the vastness and unboundedness of life (which is not really divided spatio-temporally, except into Beings) - otherwise there would be no point in having a theory!
A good theory renders graspable the most significant aspects (for the current purpose) of that vastly interconnected web of communication and interaction which is Everything.
This is why even the very best theories can never be put into practice.
It explains why we always come-up against the intractable problem of actually living by our understanding of God, creation and salvation.
And, in Christianity, even the true-est and real-est and most-good theology cannot be put into practice in Life.
Life is just so much greater than any theory!
When we try (and many have tried) to implement theoretical understanding, to live by The Book, The Rules or whatever - then it will fail.
This does not mean that theory is worthless, yet it never is the truth. It does not mean that theory is useless in some particular practice, yet theory should never be a blueprint.
(For instance: Even the most perfect system of law is unjust; unless interpreted by a good and wise judge - who takes into account the many ways in which the law fails to describe reality.)
However, we cannot just dispense with theorizing; because we live inside theory. Indeed, we live inside totalitarianism; which is a theory of everything, that denies any limitation, which tends always to encroach everywhere.
This is because totalitarianism is rooted in negation, in the double negative values of a theory being against itself - a self-consuming, self-destroying theory of all.
Our problem is to escape from the habitual thinking of the inculcated self-tyranny of this System, which theory we actually accept by socialization; because the totalitarian theory dominates public discourse, and we are compelled to live-by-it in most (and ever more) areas of life.
So one value of theorizing is if it helps us break free from the mind-control of the actual-and-evil theory under which we Live.
But whatever alternative theory we discover or devise (even the best imaginable theory of Christianity); we shall come up against the necessary fact that our theory is ultimately wrong because grossly incomplete; and cannot (as well as should-not) be implemented as a blueprint for Life and Living.
The ultimate goal is perhaps always to go beyond theory to live in freedom in accordance with divine creation - not by theory but by intuition, divine inspiration, by knowing reality.
In the meanwhile, in this mortal life on earth, we must continue to use theories; but should strive not be used-by theories.
