Definition: Apostates were individuals who left their beliefs in Jesus Christ. They often rejected Christianity due to their own personal philosophies, practices, or beliefs, rather than accepting it as a complete faith system like Christians do. These individuals often believed that Christianity was not authentic and could be a fraud or deception. The term "apostates" is found in the New Testament in Acts 17:19-20 where Paul's letter to the Galatians discusses this phenomenon of believing false beliefs while rejecting Jesus' teachings.