"Though he didn't dwell on those events from long ago, he didn't avoid thinking about them, either. He could no more erase that chapter of his life than he could change his birthday. While there were times when he wished he could roll back the clock and erase all the sadness, he had a hunch that if he did so, the joy would be diminished as well. And that was something he couldn't contemplate."
I couldn't agree more! (taken from: At First Sight)