Reminds me ...
Inquisitive Soviet student: "On TV they are constantly saying that communism is on the horizon. What is this communism?"
Soviet teacher: "Well, communism is a society free from exploitation, where everyone is free and equal. It is our happy future, when nobody will live in need."
Student: "But what is a horizon?"
Teacher: "Well, I can explain that to you too. A horizon is an imaginary line that keeps moving further away as you get closer."