Revelation 10:2

and he had in his hand a little book open: and he set his right foot upon the sea, and his left upon the earth;

This verse introduces the principal theme in this chapter; namely, "the little book open" in the hand of a mighty angel. Pieters titled this chapter, "The Great Angel and the Little Book,"[20] and we would like to change that by the addition of a single word: "The Great Angel and the Little Book Open."

And he had in his hand a little book open ... See introduction to this chapter for our arguments positively identifying this little book as the New Testament of God's will. No other book, whether large or small, in the history of the whole world, could deserve the importance indicated in the powerful scenes of this vision. Behold this mighty and glorious angel so tall and glorious, standing with one foot in the ocean and another upon the continent; and what is he doing? He is holding a little book open! What does that say about the importance of that little book? No other function than that of holding open the little book is ascribed to this glorious being. Not even the words of the seven thunders which he uttered, or caused to be uttered, were recorded, perhaps by design that nothing should detract from the all-important thing the angel was doing.