Why we believe there is only one Gospel of Truth

The Bible teaches that there is only one Gospel and that belief of that is essential for salvation (Mark 16:16).  So its rather important to make sure you believe this one Gospel.  You wouldn’t want to discover when before Jesus Christ when he returns that you didn’t actually believe the correct Gospel.  (Hint – the true Gospel is not what most Churches teach.  Hint – What was the gospel that Jesus preached?)  So come and hear what is the one Gospel.