Gino (29 July 2018)
"Is there significant difference between the words, "shall be", and "must be"?"

Could the difference in the words, "shall be", and "must be", indicate that something significant happened in line 4:1?

Revelation 1:19 Write the things which thou hast seen, and the things which are, and the things which shall be hereafter;

compared to:

Revelation 4:1 After this I looked, and, behold, a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter.

After John was called up into heaven, "shall be", was changed to, "must be".
Could it be that the timing between 1:19 and 4:1 was not connected to events, and was long, hence, "shall be"?
But once 4:1 happens, if that indeed is a picture of the blessed hope, then the timing of things will then be set?
i.e. three and an half years?
hence the use of, "must be", after that?