Purity Is Sin

Reality has fractal complexity, descending into depths as ones tools to inspect it increase in resolution. Models are facsimiles of reality that are useful to predict or describe this complexity. Their usefulness therefore comes from their simplicity. But necessarily, this means that they elide the minor harmonics. This, in turn, means that strict adherence to the model is pointless since you only use the model to attempt to run a simulation further or to attempt to understand the much more complex reality.

Purity in adherence to a model does not advance comprehension of the reality so if the latter is one's objective, Purity Is Sin.

This is also expressly true with one's principles. Monastic adherence to principles is a thing that is useful if the principles are infallible. Theists and Monks easily find this condition to be true, but those for whom Principles Are Compressed Images Of Reality this is not the case, and so expressed principles will have edge cases and exit hatches that cannot be fully described without entering into the complete complexity of reality.