"So let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths, which are a shadow of things to come, but the substance is of Christ." (Colossians)
If the events, festivals, and stories that happened in "BC times" were completed and fulfilled in Jesus, then Paul accurately describes them as shadows cast from the figure of the cross. What I never thought about before is the role of light in this metaphor. If the shadow is in the past, and the substance was at the centerpoint of history (that is, 30 AD), then where is the light coming from? It would have to be from God's future, the fulfillment of all things, the light from judgment, finding things out and setting things right.
The negative view of judgment is so prevalent that I'd never seen it this way before. But if the second Advent is about finding things out and revealing the way things really are, I think it's appropriate to think of it as a light shining through history, with the prophets and festivals beforehand being the shadows it casts through the cross.
This must be balanced with the fact that the Day "will be darkness and not light", but I think it's a helpful extension to the image Paul gives to those in Colossae.
For me, this is the reminder that a Christian's focus should be on Christ: not on models of creation by the father, or questions of history of geneologies, or details of which festivals and how long and budgets and the like, all things that have their place, but the real substance is the life that was lived, ended, and transformed at the turning-point of history.
To continue this line of thought, should the Gospels be read more often than other books? They are the real description of the centerpoint of history. Does the church become unbalanced when it focuses on another part of the Bible: say, Genesis, or Romans, or Revelation? Or does grace keep things balanced even so?