From the fourth century until today, Christians have created things to do together, rituals, in order to experience for themselves the great simplicity of redemption. These rituals are meant to recur, they are the stones of an archway which, once built, is there to use, to go in and out by prayer and so to find pasture. We do not want to be rebuilding a different-shaped arch, however entrancing, but to use what we have, what we are used to, in order to enter into the real business of prayer. So the ceremonies of Holy Week, beginning with Palm Sunday, are there to be used, and this is a physical matter, a use of the body, so that all of ourselves will know. Intellectual apprehension of truth is all very well, and indeed for some it is enough; but for most of us, we live in a half-light, neither awake nor asleep, wanting to understand but not quite able to think it through; we need to be there to act it out, to participate. This is in no way an alternative or lesser kind of theologizing; by both ways we come to the central theme of redemption, the flesh-taking of Christ in which he returns to the Father and takes us unto the dynamic life of the Trinity which is the ultimate procession, and it is by physical processions that we can learn to become part of that reality.
The last days of Holy Week provide a simple way of allowing the body, the flesh, to learn theological truth by doing and being in earthly processions. Palm Sunday's procession is about how to do the basic human thing -- to walk, to take one step, just to be able to do the next step, and to remain with that doing, not seeing a much quicker way to get there by a bus, a train, a ship, a plane, which are quicker than our feet; we are always dashing through in order to be somewhere else, and when we are there then we think we will begin. But the procession is a slow, corporate event, the pace set by the weakest and slowest. Like growing, a procession is something done for its own sake, and in doing it we are becoming what we are not, going by a way we do not understand, for a purpose that is God's, not ours, in ways that are too simple for our sight.
