There are any number of attempts to explain the sea of glass. The two most helpful passages for understanding this are Exodus 24:10 and Ezekiel 1.
This has to do with worship. Too often you see Christian worship – whether it’s in a Christian union or even in the church these days – and it’s too informal, it’s too casual. It is very subjective. It starts with me. The prayer opens – ‘Thank you Lord for saving my soul.’ Nothing about him, the Lord. Nothing about his might and majesty. No seeking of a sense of God. No humbling of oneself before the mighty and the everlasting and holy God. That is the fashion today. To say too much about that would frighten people, they think. Be informal; be casual. Turn the mighty God into your mate down the road. Make it so informal he ceases to be God at all. Maybe it mentions some good things – Calvary and the blood of Christ – but it’s all about me and the benefits for me. If you take the Book of Revelation as the model of worship, you start with God and his attributes, and we come to first and foremost bring him glory and honour and praise, and then we move into gratitude and thanks, after that. That is how the worship in these chapters works. It’s all objective. Only as chapter 5 goes on does it become subjective as we will see, and the honour is to Christ who has done such wonders for us. But don’t skip over the worship of Almighty God in the beginning.
What exceeding great rewards await those who are faithful unto death! Is it not worth our effort to sanctify ourselves and to keep ourselves from sin?