What was the most classic saying about love?

The most classic sentence of love might be: I love you, no matter what happens, don't give up on me. This sentence came from the novel The Moon and Sixpence by Somerset Maugham. In the novel, the protagonist, Charles Streed, gave up his wife and children in order to pursue his inner artistic pursuit. Finally, he became a successful artist under his pursuit. However, the emptiness and regret in his heart made him realize that he had lost the most precious thing in his life, which was his beloved wife. At the end of the novel, Charles quoted this sentence to express his deep love for his wife and urged people to cherish the little things in life and not give up on the love for themselves and the important people in their lives.