But because you are partakers of Christ's sufferings, rejoice; that at the revelation of his glory also you may rejoice with exceeding joy.
At the revelation of his glory ... Peter used this same expression in  1 Peter 1:7; and, in both places, it is better to understand it as a reference to the Second Advent, the general resurrection and judgment of the last day, and the visible revelation of Christ before all people as the Redeemer and Judge.  Such a revelation is that mentioned by Paul in  2 Thessalonians 1:7-10.