A lit candle in a darkened room sits there but speaks nevertheless. On the other hand, a lectionary, hidden from view, sits there but is silent. A lector carries a lectionary in procession up to a lectern whereby both lector and book become associated wi th each other. The lector places the book on the lectern and leaves it. The lector returns to the book, opens it and looks at to find his text.
Book becomes lectionary in the proclamation of the lector.
As a source for proclamation, it becomes the deposit of the Christian tradition of the Word of God. The assembly is aware of all of these small actions. Carrying and presenting the lectionary lets the lectionary speak. Otherwise, it's just a book. After being handled in eucharist, it speaks of itself as the body of Christ.