It can be difficult to nail down a change in perspective. Sometimes, you know the change was within you. You see the world a different way now. Some part of how you interact with and perceive the world is different. Sometimes, the world has changed, either gradually or suddenly doesn’t matter since you tend to notice it all at once regardless. What is within your view has been altered and now things look different to eyes that have largely remained the same. Sometimes, the world hasn’t changed and you haven’t changed, but you’ve noticed something for the first time.