1) First, Origen raised the basic issue of addressing the function of Scripture for the church which is to be a living and continuous vehicle of divine revelation.
2) Origen struggled to do justice both to the particularity of the literal sense of the text and also to its fuller, spiritual role as a divine pedagogy in hearing testimony to the salvific work of Jesus Christ to the church and world.
3) Origen raised the question as to the faithful role of the interpreter in the exercise of creative response in receiving and transmitting the truth of the Sacred Scriptures to a community of faith and practice.
Without a form of allegory that at least allows for analogy, the biblical text can only be an object of archaeological interest.
Update: Check out this fun post from Bishop Alan. I particularly like the latin ditty from Nicolas of Lyra!