"...There will be no more delay! (at the 7th trumpet)...the mystery of God will be accomplished..." (10:6b-7). See 1 Corinthians 15:51-58.
"I took the little scroll from the angel's hand and ate it. It tasted as sweet as honey in my mouth, but when I had eaten it, my stomach turned sour." (10:10). As happy as we may be to think about the life described in chapters 21 & 22, the process the world must go through to get God's People there is sickening -- to say the least! "Then I was told, 'You must prophesy again about many peoples, nations, languages and kings.'" (10:11).
The scroll in 5:1 is sealed, the scroll in 10:2 is classified as "little" laying open in his hand. Delivered by a mighty angel, robed in a cloud (Jesus ascended in a cloud), with a rainbow above his head (in 4:3 a rainbow encircled the throne), his face was like the sun (pure white?), and his legs (actions?) were like fiery (hot!) pillars. In Galatians 2:9 the apostles, who were closest to Jesus, were called pillars in the church. 1 Timothy 3:15 refers to God's household as the pillar and foundation of truth. In Revelation 3:12 the Philadelphians who overcome are referred to as a pillar in the temple of God.
The roar of a lion (10:3), brings to mind Jeremiah 25:30, Joel 3:16 and Amos 1:2.
In 10:4 John was not permitted to write what was said at that time.