Read the passage from Ronald Reagan's "Tear Down This Wall" speech. Perhaps this gets to the root of the matter, to the most fundamental distinction of all between East and West. The totalitarian world produces backwardness because it does such violence to the spirit, thwarting the human impulse to create, to enjoy, to worship. The totalitarian world finds even symbols of love and of worship an affront. . . .

As I looked out a moment ago from the Reichstag, that embodiment of German unity, I noticed words crudely spray-painted upon the wall, perhaps by a young Berliner, "This wall will fall. Beliefs become reality." Yes, across Europe, this wall will fall. For it cannot withstand faith; it cannot withstand truth. The wall cannot withstand freedom.

What is Reagan’s main purpose in this passage?

to threaten the Soviet Union
to urge an end to communism
to explain why he is visiting Berlin
to applaud small acts of resistance