It’s when you think you have it all figured out that you realize you truly know nothing.
Here’s a philosophy lesson that’s briefly referenced. It begins with the foundation that the only “reality” is that which you perceive, and that includes every other person you meet. Just as they only exist insofar as you know them, you only exist in how others know you. Therefore the “you” inside everyone you meet is different, and each of them is an accurate representation. And as a single person, you may also do anything you wish to your own representations of people you know, their existences inside of you. Hopefully that clears things up a bit.