Feather of Truth. A real Ostrich feather (about 10 inches long) which was the feather of truth or feather of Maat in Egyptian beliefs. In the Egyptian afterlife, the heart was weighed against the feather of truth. If the heart weighed less than the feather of truth the person could continue into the afterlefe. Maat a female goddess is pictured with a single feather of truth in her hair.