another 2 cents worth
While I agree that patent claims are likely the most important part of a patent application, the information one supplies in the body of the application can make or break a patent, especially one filed pro se.
Unless the patent office rules have recently changed, a pro se filer may request assistance from the patent examiner in drafting claims. If the examiner finds merit in the patent application, but the ensuing claims are improperly written (i.e., in claims one must first mention a widget, then said widget, and afterwards, the widget), then the examiner must draft claims that adhere to office rules. However, if there is no merit in the body of the application, this will not happen and it will be denied.
Also, patents hinge upon anticipation by previous filings. For example, if a patent is granted for new and inventive doggie toenail clippers, then someone else may be able to patent a similar (but different) device for cats. However, even though the claims may relate only to dogs, if the body of the application states, "the applicant recognizes that the doggie toenail clippers may be adaptable for usage on cats, monkeys, iguanas, and other creatures," that would likely preclude another filer from gaining a subsequent patent for similar usage on other animals.
That being said, filing a patent application pro se can be a challenging, frustrating, rewarding, and even fun endeavor. However, the inclusion, or omission, of a single word can make or break one's effort. If you do find a patent agent or attorney willing to provide you with "application insurance," let us know. I'm sure there are others who would like to write their own application and still have the confidence afforded by a professional.