According to kennan, what are the plans of the soviet union?

I'm not sure if thats what is about but, George kennan sent a lot of telegrams taking about his views about the soviet union, he was among u.s diplomats to establish a american embassy in the soviet union. after the U.S president dies he tells everyone that the U.S and the soviet union cant have peace.
 

According to Kennan, the plans of the Soviet Union is to expand Communism to Western Europe.