Based on the principal theories and previous studies about Virginia Woolf and her work, considering Woolf’s view about life and writing, this paper attempts to explore the life philosophy of Virginia Woolf about truth and reality by analyzing the symbolic meaning of the image of “wedge-shaped core of darkness” in To the Lighthouse, which appears once in Chapter 11 of the book, but could be the very symbol to demonstrate Woolf’s inward understanding of truth and reality.