"Can't repeat the past?" Why, of course you can!"

"Can't repeat the past?" Why, of course you can!" Gatsby is saying this as he's talking with Nick about his reuniting relationship with Daisy. It is significant because it is he is trying to catch up with the time he has lost in his life, for example the scene where he catches the clock he knocks over in Chapter 7. He is trying to redo his life but is trying to perfect past events, like his relationship with Daisy, and his lifestyle.