Comedians with insight

I always felt that it is keen insight that distinguishes great comedians from the mediocre.
Here are a few from George Carlin:
 
"There are nights when the wolves are silent and only the moon howls."

"Weather forecast for tonight: dark. "

"Just cause you got the monkey off your back doesn't mean the circus has left town."

"Inside every cynical person, there is a disappointed idealist."

"I went to a bookstore and asked the saleswoman, "Where's the self-help section?" She said if she told me, it would defeat the purpose. "

"When someone is impatient and says, "I haven't got all day," I always wonder, How can that be? How can you not have all day?"

And here are a couple from a guy called Murray Walker who was a sports commentator, some of the lines are very Yogi Berra-sque:

"And now, excuse me while I interrupt myself"

"Eight minutes past the hour here in Belgium - and presumably eight minutes past the hour everywhere in the world."

"He can't decide whether to leave his visor half open or half closed."

"I don't make mistakes. I make prophecies which immediately turn out to be wrong."