On Mt. Sinai, God said, "You shall be to Me a kingdom of priests and a holy nation." When Peter spoke on the Day of Pentecost, he was referring to what God spoke of on that first Pentecost, that those who would be in Messiah Yeshua would be the priesthood. But Yeshua was not a High Priest like Aaron, but as we see in the book of Hebrews, Yeshua is a High Priest in the order of Melchizedek. So who is Melchizedek?