✔ 最佳答案
Peter wasn't addressing a future revelation of the Christ, but the response of Christians when they first learned and accepted that salvation would be through Jesus Christ.
In the verses leading up to verse 13 Peter makes the point that they have faith in Jesus Christ for the salvation of their souls—something that the prophets of old and even the angels were intensely interested in.
(1 Peter 1:12) 12 It was revealed to them that they were ministering, not to themselves, but to you, regarding what has now been announced to you by those who declared the good news to you with holy spirit sent from heaven. Into these very things, angels are desiring to peer.
Hence, they should brace up their minds for activity. Verse 13 uses the expression "brace up your minds for activity". The literal words was "grid up the loins of your mind". When someone prepared to work, they would take the material of their clothing, wrap it in such a fashion it would not hinder their work.
Since this is due, not to the final revelation of the Christ as described at Revelation 19, but because of their accepting the means of salvation that comes through his sacrifice, they would do the work that Jesus commanded at Matthew 28.
The rest of that 1st chapter highlights the activity of those who have become followers of Jesus Christ. Verse 21 says the following:
(1 Peter 1:21) 21 Through him you are believers in God, the one who raised him up from the dead and gave him glory, so that your faith and hope might be in God.