Struggling with Juggling

My colleague is dishing out his philosophy on life. He is talking in a very loud voice and is irritating me. He says, "If you hit your head on the wall, you still have a head."Blah, blah, blah...I can no longer concentrate. This has been going on for about an hour. It is boring and I can't work. I have a mean headache. He is talking at me now. Does he not realise that I am not listening?