No one knows for sure if Ananias and Sapphira were truly Christians when they decided to lie about the land that they sold ([Acts 5:1-10](./01.md)), because Luke does not say. He does say that they were among "those who believed" ([Luke 4:32](../04/32.md)). However, Peter knew that they lied to the believers, and he knew that they had listened to and obeyed Satan.