Dr. King refers to peaceful protest when referencing the "majestic heights". He describes peaceful protest as meeting physical force with soul force, or the will to see that justice is enacted through nonviolent means. This is truly a difficult thing to accomplish in the face of brutal injustice, and is a majestic height to reach indeed. Dr. King proved that such heights could be reached, and that real progress toward equality could be made by nonviolent means.
Answer:
the author's purpose is to persuade or convince
