There are only two first lines that I can recite from memory: Don Quixote's and García Márquez's One Hundred Years of Solitude.
Don Quixote's I memorized only because I studied hispanic literature and how could you not know that first sentence? The second one, I know because I simply love the book. It is the only book that I have read five times. If I had not read that book, my love for literature would have never been born. So, I did not memorize the line, I know it by heart in both English and Spanish. Oh, and what a last line too! But that's another topic...
"Many years later, as he faced the firing squad, Colonel Aureliano Buendía was to remember that distant afternoon when his father took him to discover ice."
