Puzzled About Revelation, Part 31: The Mystery and Message of Revelation 7

Join me this week as we return to our study of the Book of Revelation in the 7th chapter, a chapter that is both simple in its message and challenging in its mystery. In this first part, we will look at the overarching theme of the chapter as well as discuss some issues of interpretation so that we can answer some common questions such as:
What is the seal of God?
Who are the mysterious 144,000, and why are they sealed?
Who are the great multitude? Are they connected to the 144,000?
When do these events occur?
And how does this chapter reveal our Redeemer and the hope that we have in Him?