PARIS: “Let me not to the marriage of true minds admit impediments. Love is not love which alters when it alterations finds, or bends with the remover to remove: O no! It is an ever-fixed mark that looks on tempests and is never shaken; it is the star to every wandering bark, whose worth’s unknown, although his height be taken”.
Paris is quoting from William Shakespeare’s Sonnet 116, first published in 1609, and one of his most famous love sonnets. She is demonstrating how well she has studied for the test, although only Paris could recite a love poem to someone as a threat.
The Annotated Gilmore Girls 