Final answer:
The exact phrase that Winston writes at the end of Part I, chapter 1, of George Orwell's novel '1984' is not given in the text; it is left to the reader's imagination.
Step-by-step explanation:
At the end of Part I, chapter 1, in George Orwell's novel 1984, the phrase that Winston writes in his diary is not explicitly mentioned. The chapter actually concludes with Winston writing down several reflections about the Party and his life, but the specific phrase he writes at the very end is left to the reader's imagination.
The provided excerpts from literature illustrate a variety of literary techniques and thematic elements, such as the use of fog to represent confusion or obscurity in a narrative, but do not directly answer the question regarding Winston's phrase in his diary.