Writing is a way to both literally and metaphorically put a mark on the world. It is a process to lead students to read critically and deeply, and write effectively and clearly. It is also an approach to figuring out what ideas students really care about and guiding them to write about these ideas with care and depth. Writing courses are usually required in American colleges and universities, which aim to cultivate undergraduates’ written communication ability and critical thinking. The Harvard College Writing Program was founded in 1872, and its expository writing course is the only academic experience required of every undergraduate today. Beginning with her college writing handbooks and expectations for cooperation with China, the interview was carried out with a focus on the following themes: why Nancy Sommers has devoted herself to writing education; why she has focused her research on revision and responding; why she set up the Harvard Writing Project; why she created the Harvard Study of Undergraduate Writing; and why she set up the Writing Workshop for graduate students. In this profound and impressive interview, Sommers attributed her success to loving to read and loving to write. She pointed out that learning to write is a great way for college undergraduates to learn more effectively about the various other subjects which they study, and regarded writing as the power that helps students set a course in life for themselves. At the same time, she stressed that writing is the center of undergraduate education, and that at the heart of writing is really revision. Sommers also elaborated on revision strategies of student writers, responding to student writers, writing partners in the Writing Workshop, the idea of ten thousand hours of practice, the relationship between speaking and writing, “personal dragons,” and avoiding plagiarism.