One thing that I often think about is how we define different things, like colors, tones, even emotions. What separates anger from frustration, for example, or blue from green on a color gradient? What separates good from evil, when examined closely? Is it intent? Effect? Both? When does hale become sleet or freezing rain? When does energy become matter? When does homosexuality become bisexuality?
Those are all just examples of what I'm talking about. Perspective seems to dictate, at the very least, where we draw the proverbial line between one thing and another. It is interesting that when we "zoom in" on a particular thing and examine its boundaries, those boundaries seem to disappear from our perception.
Boundaries are illusions. They are missing links in our knowledge, and that is what separates things in our minds.
Now for a real challenge: What separates weather from sexuality or color from intent?
From the moment we come to this earth we start attaching concepts to what we perceive. Some of them are instinctual, some logical, some taught. Some are correct, some incorrect. It's in the act of thinking that we bring percepts and concepts together.
So to sum it up, I would say these are the things that shape our conceptual view of the world:
-Instinct
-Logic
-Being taught
You could say it's ideal to be open to altering the concepts that shape your world. For me, this is a lot of what meditating is about.
There's no teacher like experience.