One of the persistent wrong beliefs that the Church is the belief that we humans are made up of one horrible part that is material and the real eternal part, the part of goodness, that is spiritual. While it has taken on many forms over the course of history, the Church has always proclaimed that because the material world is made by God, it must be good. It is usually founded upon the premise that the evil material body will give way to the freedom of the spiritual liberation that awaits. This idea holds particular appeal for those whose lives are filled with deep suffering and hardship.
The very founding of the Order of Friars Preachers came to attack this wrong idea. When Dominic left Spain, he encountered a version of this dualism that had swept large parts of France. The people he encountered were desperately poor, and had heard little about the gospel and the good news that God comes to save.
The reason this belief took hold so strongly was the same reason Paul did not always get things right: Ignorance. People did not know Jesus, and they were unaware of his great desire to save. Part of the reason they had not yet heard this before, was that those who came to preach to them bore little or no resemblance to their hardships and struggles.