I like to talk about trajectories in scripture. This may sound odd to some. A trajectory, according to Merriam-Webster, is “a path, progression, or line of development resembling a physical trajectory.” When I talk about scriptural trajectories, I’m referring in particular to the last part of that definition–a line of development. (Compare also the use of this term in the Wikipedia article on Biblical Theology.)
Many Biblical passages need to be read not simply to find out what the say, and who they are saying it to, but also to discover where God is going with a particular set of commands. In Christian theology we might identify a trajectory in a tabernacle and a sacrificial system that leads eventually to direct, personal access to God’s throne as described in the book of Hebrews. The command to offer a lamb might seem to merely indicate that God likes animal sacrifices. If we view it in the light of the trajectory, we may find that God does not like sin, and likes us to be reminded of it each time. In addition, it can remind us of the cost of sin on a regular basis, and also tell us that even if we are very far from God, he is nonetheless willing to make a way for us to approach him.
