All of the Bible leads to the conclusion that God will come to be with us, but sin separates us from God. Sometimes we are tempted to downplay our sin, but that downplays God’s holiness. We see God’s holiness overpower many people in the Bible.
We also see that the Messiah is prophesied to have a priestly role, who will finally end sin by sacrifice of Himself, and that He would come in what we call now the first century AD. The Messiah, however, need not be a Levitical priest, but as we know, is a priest forever of the order of Melchizedek.