At times God [reveals His Word] by an internal breathing-on or inspiring that includes immediate illumination. At times God does this through external speech, and this is published mediately or immediately by angels and humans as His heralds and ministers, or it is put into writing, and this we call the written Word or Holy Scripture. These distinctions, however, do not create any essential difference within the Word of God. . . . After all, it is one and the same Word and counsel of God regarding our salvation.

Gerhard, Theological Commonplaces Exegesis 1, p. 24

Since the Word is one, we participate in disseminating that one Word when we proclaim or write about the Lord. We join ranks with all the prophets and saints of all times who proclaimed the one Word. We have a connection with all hearers of all time who have heard and read the one Word. We are even connected with all created order, which God called forth in the beginning by the one Word. He upholds all things by the Word of His power (Heb 1:3).