The original pristine Christianity of the New Testament gradually became distorted. Music at time of Ambrose, later Gregorian chants. How to be in the world but not of it. Economic controls to protect the weak. Lorenzetti's Allegory of Good and Bad Government .
Questions Summarize the negative and positive aspects of church influence in the Middle Ages.
To speak of distortions of belief in the Middle Ages is to pretend that the church should have stood still when the apostles died. But we have to adapt to new circumstances and ideas. The medieval church did. Apply the particulars-universals discussion to modern circumstances. Many of these works are no longer in print, but can be obtained in local libraries.