Bittersweet

And I went unto the angel, and said unto him, Give me the little book. And he said unto me, Take it, and eat it up; and it shall make thy belly bitter, but it shall be in thy mouth sweet as honey. (Revelation 10:9)

But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased. (Daniel 12:4)

And he had in his hand a little book open… And sware… that there should be time no longer: (Revelation 10:2, 6)

Daniel describes a book that is sealed until the last days when many would study prophecy and knowledge of it would increase. Revelation describes a book that is open in the last days, surely this is the same book. In vision John is told to eat the book and it is sweet in his mouth, symbolising those who first began to understand the prophecies, they devoured the word of God and with their learning came a sweet experience. They realised that Jesus return would be soon and they prepared their hearts to meet him.
But like the disciples of old, they misunderstood God's message in some areas, and were bitterly disappointed as the the prophecy predicted when Jesus did not come when they expected, or ever in their lifetime.

The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us- ward, not willing that any should perish, but that all should come to repentance.
10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up. (2 Peter 3:9-10)

Jesus will not come at an expected time, but an unexpected. But his faithful followers will be ready because they will order their life today as if he might come tomorrow, but they will plan for the future, and not count on Jesus return in doing this. Because we know not the hour.
Jesus delay is not because he is slow, but because we are slow to be ready for him. He is not willing for any of us to perish but that we might all come to repentance. Repentance prepares you for Jesus' second coming. Don't lay up treasure here, it will all burn.

So the prophecies pointed to a time when students of scripture would have a sweet experience understanding the end time prophecies but they would be bitterly disappointed. This was the experience of the first Adventists, and I believe in an Adventist view of prophecy today.