Music and emotional attachment

Sometimes I wonder how much emotional attachment plays into music/worship. Just sitting in church and you see people singing words that just fit together... But I wonder if they ever think about them.

For example, in one song we (actually I wasn't singing) sung "He is worthy". Now usually for something to be worthy... It has to have worth. Which means we have to have something to compare it to. How do you compare something to God?

I tend to think using music at the begining of services tends to create an emotional state in which people are more vulnerable for the message. Very odd.