Helen Suzman

Though builders may build, in the main they follow the plans of architects. Teachers teach, but they must have a text. Politicians govern, but only upon the flow of commentary that raises them up or casts them down.

Theologians have a great problem because they're seeking to speak about God. Since God is the ground of everything that is, there's a sense in which every human inquiry is grist to the theological mill. Obviously, no theologian can know everything.