Final answer:
The question pertains to Christian eschatology concerning the duration of Christ's reign. Biblically, Revelation 20:4-6 states a reign of a thousand years, whereas other interpretations suggest until all enemies are under his feet or forever, based on other scriptural passages.
Step-by-step explanation:
The question "How long must Christ reign?" refers to a concept from Christian eschatology, particularly the doctrine of the Millennium described in the Book of Revelation in the New Testament. The options provided are:
- A thousand years
- Forever
- Until all enemies are under his feet
- Until the Judgment Day
The most straightforward biblical reference to the length of Christ's reign comes from Revelation 20:4-6, which suggests that Christ will reign for a thousand years. However, other parts of the Bible, such as 1 Corinthians 15:25-26, imply that Christ will reign until all enemies are put under his feet, which is interpreted by some as being until the Judgment Day. The concept of Christ reigning forever is a theological interpretation found in Revelation 11:15 and other scriptural references that assert the eternal kingdom of Christ.