No supervisor would every say that you can do without editing your work. Editing is an essential part of thesis writing and surely as important and difficult as writing it is. How much ever perfect you think your writing skills are, you would always find scope to remove errors upon editing and proofreading. Researchers have their own set of choice between self-editing and hiring a professional editor for doing the work. Both options have their own set of advantages and disadvantages. Here are few to share: