Rev 10:4

4 When the seven thunders sounded, I was about to write; but I heard a voice from the sky saying, “Seal up the things which the seven thunders said, and don’t write them.” 

do not write them – these are inexpressible words, that no man is permitted to speak, as Paul says in 2 Cor 12:4. These inexpressible words must be great praise to God and the expression “Hallelujah!” As we explain at Rev 17:14, there are three “King of Kings” in the Bible. The Beast is the first King of Kings, Christ is the second, and God is the last. Our Lord’s prayer is “may Your kingdom come on earth as it is in heaven.” God’s kingdom has not yet come on earth, not until “the new earth” has come. So John is told not to write the words, that are true only in heaven. We are now about to understand the “time, time and half a time,” from the little book that the Angel gives to John.