This quote is about how going away from a certain place can positively affect how you see it when you return. When you go away, it gives you a chance to gain new experiences, ideas and perspectives on things. When you come back, you have a better understanding of the place and the people in it. The quote suggests that returning to a place is not the same as never leaving, because you can appreciate the place more when you come back, having acquired a new understanding of it.