This is seen by the indisputable fact that the greatest and most influential preachers and teachers of the ages past, and the age in which we now live, have made constant use of it.

The messages of the prophets were delivered in the open air. God’s call to the prophet was: “Go, proclaim these words in the streets of the city” (Jer. 11:6). The sublime evangelical predictions of Isaiah; the mournful dirges of Jeremiah; the symbolical and picturesque visions of Ezekiel—all these, for the most part, were announced in the streets of the great cities of Jerusalem and Babylon. Throughout the streets of Nineveh resounded the warning voice of the prophet Jonah. The message of Micah, Nahum, and the rest of the minor prophets was, without question, “a song of the winds.” Nehemiah’s great revival sermon—a sermon which resulted in an almost national revival—was preached in the street of Jerusalem, close to the water-gate. (Neh. 8:1, 3.)

The open-air worker and preacher of to-day, then, is in “the goodly order of the prophets.”