The document discusses biblical passages that suggest sacrifices and observance of Jewish festivals will be reinstated during the Millennial Kingdom after Jesus' second coming. It provides numerous references from prophets like Ezekiel, Isaiah, Zechariah and Malachi that describe the rebuilding of the temple, reinstitution of sacrifices and priestly duties, and celebration of feasts like Passover and Tabernacles in the Millennium. The document argues this system will not be obsolete, as some Christians believe, but rather it will serve as a reminder of sins and of God's past dealings with his people until the eternal state begins.