sentences:  Egyptologist Louis Vico Žabkar argues that the bꜣ is not merely a part of the person "but is the person himself", unlike the soul in Greek, or late Judaic, Christian or Muslim thought.The idea of a purely immaterial existence was so foreign to Egyptian thought that when Christianity spread in Egypt, they borrowed the Greek word "psychē" to describe the concept of soul instead of the term bꜣ.Žabkar concludes that so particular was the concept of the bꜣ to ancient Egyptian thought that it ought not to be translated but instead the concept be footnoted or parenthetically explained as one of the modes of existence for a person.