Corruption
Appearance
In philosophical, theological, or moral discussions, corruption often refers to spiritual or moral impurity, or deviation from an ideal. Frequently, this takes the form of contrasting a pure spiritual form with a corrupted manifestation in the physical world. Many philosophers, in fact, have regarded the physical world as inevitably corrupt (Plato being the most famous example of this school of thought).
In a moral sense, corruption generally refers to decadence or hedonism.
In theological or political debates, certain viewpoints are sometimes accused of being corruptions of orthodox systems of belief, which is to say, they are accused of having deviated from some older correct view.