What are some of the most beautiful lines in literature, in your opinion?

shall I compare thee to a summer's day 

So sorry. I could not understand What is meant by your question. would you add more explanation?

regards 

In my younger and more vulnerable years my father gave me some advice that I’ve been turning over in my mind ever since. “Whenever you feel like criticizing any one,” he told me, “just remember that all the people in this world haven’t had the advantages that you’ve had.”

- Fitzgerald, F. Scott The Great Gatsby. p. 1.

in my opinion, the most beautiful lines in literature are those lines that describe and use beautiful metaphores ans similies. those lines emboded and reveals the power of language.

hi dear dina ,really I dont know what do you mean exactly, but as far as I'm concerned I can say the best lines in leterature is that it can improve your vocabulary ,especially while reading poems or tales or even short stories, studying leterature will make you understand things  spontaniously and understand ambiguious phrases

“Pain was their body's way of telling them that they'd pushed themselves to their limits -- which was exactly where they were supposed to be.” ― Richard Marcinko, Rogue Warrior