Well, for starters, it means that we have the power to create our own reality - or at least, influence it. By changing our perspectives and beliefs, we can literally change the way we see the world. It's like, if we believe that the world is a negative place, then that's what we'll experience, but if we believe it's a positive place, then that's what we'll experience too.
Now, you might be thinking, "But what about facts and objectivity?" Well, here's the thing, even facts can be subjective - it's all about how we interpret them. And that's what makes life so interesting, right? The fact that we can have different opinions and perspectives is what makes the world such a diverse and fascinating place.