"Science has proven every 7 years you have a totally new body. Not just your cells are replaced. It’s been shown you don’t have a single atom from your original body. So it's obvious your body has nothing to do with your sense of self.
Next consider your memories. These change over time too. Consider your emotions during a hard time. When it happened, you hated every moment but as time goes by, the pain lessens, and you may even see the good that came from the experience. So what changed? Surely the event didn’t change. Was it your perception?"