No longer will there be anything accursed, but the throne of God and of the Lamb will be in it, and his servants will worship him. They will see his face, and his name will be on their foreheads (Revelation 22:3-4).
This is one of those texts that probably only makes sense if we understand that there is one God in three persons (Father, Son and Holy Spirit). In this text, the Lamb is figurative language of Jesus, the Son. There is a throne of God and of the Lamb, yet the personal pronouns, ‘his‘ and ‘him‘, are all singular. If the Lamb and God were completely distinct, then these verses would have used the personal pronouns ‘theirs’ and ‘them.’
While the Trinity may be a somewhat difficult concept to grasp, the language of the Bible leaves us no other conclusion than there is only one God. Yet, the Father, the Son, and the Holy Spirit are all identified as God. Thus, we arrive at the understanding of the Trinity. It should really come as no surprise to us as finite, created beings that we cannot fully grasp the concept of an infinite, uncreated being.