“We cannot have any unity as long as there are those who truly believe that they are sole possessors of the Truth -- and that includes the Catholic hierarchy.”

Part 1.
It is unbelievable, anyone who thinks that they are sole possessors of the Truth!  Anyone who thinks that do not know neither God nor themselves.   We humans don’t possess the capabilities to know God in his entirety.   What we know about God maybe truth but never the entire truth. 

God's spirit is immanent in all living for God's spirit is the sole spirit and life energy in this universe.  He is drawing all living to himself by His Spirit presence according to what each is capable to respond.  

It is not the aim of each religion to sacrifice half of differences to become one religion.  Each religion must be true to their spiritual heritage, for that is the source of their power and gift to the world.   We need to find a way to share each others true spiritual heritage to enriched by the other religion.