Captain Obvious here, letting you know that the sun is an important symbol in Donne's "The Sun Rising." We'll give you a minute to process that. Ready?
Donne uses the sun in a couple of different ways. In the first stanza, it's the passage of time. The sun marks the passing of hours, the changing of the seasons. And the passage of time is an enemy to his love. He wants to stay stuck in this loving moment forever. The sun also represents power, strength, and authority. It represents a call to get up and get to work.