This revelation does not occur in light of the Passion, but when the risen Christ himself directs the disciples to the scriptures. The text of the Old Testament, previously viewed as a narrative of the past, is revealed as a thesaurus of imagery, with the historical event of the Passion as its starting point.
This revelation happens not during the Passion but when the resurrected Christ instructs the disciples on the scriptures. The Old Testament text, which was once seen as a narrative about the past, now appears as an anthology of symbols, with the Passion's historical event marking its beginning.