Dualism arose because of all the hocus-pocus of "The Church." If only believers used their Bibles and followed Romans 12:1 (written around 60 AD.) they would have seen the conjunction of body and mind in worship of God.
"Therefore, I appeal to you by the compassions of God, brothers, to present your bodies as a living sacrifice, holy and acceptable to God, a sacred service with your power of reason."

The expression “power of reason” is translated from the Greek word lo·gi·kosʹ. In this context, it conveys the idea of sacred service rendered in a “logical,” “rational,” or “intelligent,” manner. One lexicon defines it as “pert[aining] to being carefully thought through, thoughtful.” Christians are often called on to weigh Bible principles carefully. They need to understand how Bible principles relate to one another and to decisions under consideration. They can use their God-given power of reason, or thinking abilities, to make balanced decisions. This way of worship was a change for many Jews who had become Christians. They had previously lived their life following the many rules dictated by tradition. Since then, and after the apostolic teachings had been corrupted, man succumbed again to following traditions and rituals and literal interpretations of everything. Historic recurrence.