To this point, being a graduate student has been, more or less, an extension of your earlier life as a student. Many people, in fact, go to graduate school because they have always been "good at school," and want to continue with something that brings them success and self-confidence. The reading assignments, labs, papers, and tests you have been assigned as a graduate student may not have been so different from your undergraduate course work. The dissertation, on the other hand, is a new kind of academic project, unlike anything else you've done. It is the academic project that marks your transition from student to scholar.
Writing a dissertation is a lot like writing a book. It is, by definition, a self-directed process. There are usually no weekly deadlines from professors, no regular discussions with classmates, no reading assignments, no one telling you what to do—you are on your own, writing something longer than you've ever written, and doing it without a net. This independence can make the process seem very intimidating