The Medium is the Massage

I thought it was clever that McLuhan chose not to correct the mistake of the title of his book. Instead of message he used the word massage. By this he meant that the media pretty much "massages" and influences people to do a certain thing or even change their way of life completely. His main argument was that the media was an extension of our human bodies, senses, and minds. In the movie i wrote down something that McLuhan had said,

"the medium itself is the message; the medium itself is the greater influencer of society - more than the messages it is carrying."

I am pretty sure that he is saying that the whatever gives you the message is greater than the message itself. For example, the computer is the medium and it gives us messages but the computer itself has became a greater fixture in our lifestyles than the message.