In Isaiah, the prophet is before the throne of God while the creatures around the throne proclaim “Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory!” In Revelation, John is before the throne while the creatures around it proclaim “Holy, holy, holy is the Lord God Almighty, who was and is and is to come!” For some reason it never occurred to me to ask why they are saying something different.
I think there’s a point being made here. God spoke in the
Hebrew Bible through many prophets. The people of those times saw many
miraculous works. But for several centuries God was in this sense silent. Many
questioned whether God was still with them; perhaps He’d left completely on
account of their unfaithfulness. John tells us that the God who raised Jesus
from the dead is the same God who brought His people out of Egypt, who put them
to exile and brought them back. The God who was is the same God today, and He
will still be the same God in the next age.
This speaks not only of God’s uniformity, but also of
His immutability and faithfulness. Over all the ages He is a God who does not
change. He is forever holy above all things. In every age He is faithful to His
word and faithful to His precepts. This same God who called the Israelites, who
sacrificed His Son for the many, is the same God today who is faithful in our
lives to bring about blessing and hope for the age to come when He will be
faithful still.

