English essay.. please help me!!:)?

Sounds like your Professor wants you to state what YOU think about your subject and why you think that and give some evidence to prove what it is you are trying to say. He said to try giving a statement like Beethoven was the greatest composer because... Usually in a thesis you want to state your argument and give a few short reasons why you believe this. You can still use some of the background information you have but try to make your paper more like, you are trying to convince your reader why you think Beethoven is the greatest composer. Give convincing proof for your argument and develop your theme and give a solid conclusion to your argument.