And he saith unto me, Write, Blessed are they which are called unto the marriage supper of the Lamb. And he saith unto me, These are the true sayingsof God.
Just look at the verse above and you can see what the Marriage Supper is and it is hidden in plain sight. Those that are called to this feast are going to see and hear things that only come by spending time with him. It's just like when a person has several friends but they only share intimate details with the few friends they spend the most of their time with.
The Spirit of God is going to open the book and give understanding to the scriptures that have been misunderstood and twisted by mans doctrines and carnal imaginations.