John Piper once said:
if all other variables are equal, your capacity to know God will probably diminish in direct proportion to how much TV you watch. There are several reasons for this. One is that watching TV reflects culture at its most trivial. A steady diet of triviality shrinks the soul. You get used to it. It starts to feel normal. It starts to satisfy your soul. And in the end the soul that is made for God has shrunk to fit snugly around triteness.
From the book "Sustainable Power"