You see, wire telegraph is a kind of very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, and they receive them there. The only difference is that there is no cat.

I’ve seen this before, and for whatever reason I always imagine Mark Twain saying it. It sounds like the way he would have explained something complex.