The Egyptians believed that every human being was composed of physical and spiritual parts or "aspects". In addition to the body, each person had a "šwt" (shadow), a "ba" (personality or soul), a "ka" (life-force), and a "name". The heart, rather than the brain, was considered the seat of thoughts and emotions. After death, the spiritual aspects were released from the body and could move at will, but they required the physical remains (or a substitute, such as a statue) as a permanent home. The ultimate goal of the deceased was to rejoin his "ka" and "ba" and become one of the "blessed dead", living on as an "akh", or "effective one". For this to happen, the deceased had to be judged worthy in a trial, in which the heart was weighed against a "feather of truth." If deemed worthy, the deceased could continue their existence on earth in spiritual form. If they were not deemed worthy, their heart was eaten by Ammit the Devourer and they were erased from the Universe.