I think it's about that great feeling, when you've fallen in love, about how your past is sort of erased -- it becomes unimportant that you used to hold regrets. You're in love now and that's all that matters. The heart becomes 'green as wheats' again.
But at the same time, the speaker isn't naive anymore, they know love might not be forever ('it's hard' with all the baggage from the past). That's why it's comforting to hear that it doesn't have to last forever, as long as it's as strong and wild as in the teenage years.
I think it's about that great feeling, when you've fallen in love, about how your past is sort of erased -- it becomes unimportant that you used to hold regrets. You're in love now and that's all that matters. The heart becomes 'green as wheats' again.
But at the same time, the speaker isn't naive anymore, they know love might not be forever ('it's hard' with all the baggage from the past). That's why it's comforting to hear that it doesn't have to last forever, as long as it's as strong and wild as in the teenage years.