This rant is an interesting excerpt from an article I was reading. It's a quote from Jerry Mander's "Four Arguments for the Elimination of Television."
"This difference between internally generated and imposed imagery is at the heart of whether it is accurate to say that television relaxes the mind.
Relaxation implies renewal. One runs hard, then rests. While resting the muscles first experience calm and then, as new oxygen enters them, renewal.
When you are a watching, absorbing techno-guru, your mind may be in alpha, but it is certainly not "empty mind." Images are pouring into it. Your mind is not quiet or calm or empty. It may be nearer to dead, or zombie-ized. It is occupied. No renewal can come from this condition. For renewal, the mind would have to be at rest, or once rested, it would have to be seeking new kinds of stimulation, new exercise. Television offers neither rest nor stimulation.
Television inhibits your ability to think, but it does not lead to freedom of mind, relaxation or renewal. It leads to a more exhausted mind. You may have time out from prior obsessive thought patterns, but that's as far as television goes. The mind is never empty, the mind is filled. What's worse, it is filled with someone else's obsessive thoughts and images."
Taken without permission from http://www.adbusters.org/