That's because past is certain, we know what happened and how it ended, hence nothing to worry about, just enjoying the sweet memories. 

    Back to cleveland for a wedding of a couple of my good friends. It's a wonderful time to see and talk to all the old friends or acquaintance. For the reason that I've moved away, that I've survived a hard year, I can be particular confident or even cocky with those people, because past is certain, you can't have any chance to screw up more. They've bought the sweet nice intelligent version of my image.