It has been observed over and over again by commentators down the centuries that it is very striking to note the comparisons that can be drawn between what we are told in the book of Genesis and what we read particularly in these closing chapters of the Book of Revelation. Chapter 21 tracks the opening chapters of Genesis in certain important respects.
‘And there was no more sea.’ None of the things are to be taken literally. This is a vision of things that we cannot fully grasp, and which are too wonderful for us to appreciate and to understand now. There may be bodies of water in the eternal recreated earth, but in the vision there was no more sea, because the sea is a separating thing. In this book it usually symbolises internationalism, the different nations all separated from one another, and particularly, remember, in ancient times. It was hard to access other lands and nations, all with their own very distinct ways of behaving, and distinct language, all with intense pride and nationalism and against outsiders. But in the kingdom of heaven there will be no more sea, because the people of God are one, wonderful, vast family. They all have the same kind of language and capacity to communicate. There will be variety because in another passage they are represented by twelve different types of gemstone, and yet they are all of one mind. They are all pure and radiant with the likeness to Christ. There will be no more war, no more international opposition or disdain. We love the same Saviour, and there is a bond between us, and we esteem and respect each other, and love each other. Even now in some measure there's no more sea; there's no separation between the nations in a true church. Of course, because of fallen human nature, it isn’t perfect. We still have some tensions and unworthy problems that crop up, but all that will disappear, and it will be perfect fellowship and happiness and harmony in the eternal glory.