Change your focus of perception

Perception has a focus. It is this that gives consistency to what you see. Change but this focus, and what you behold will change accordingly.
-- ACIM, lesson 181


My focus is far from perfect yet, but I have noticed with some of my friends that they talk about things which I haven't seen. Like criminals living in the neighborhood and such things. I never looked for them or thought about such, so I don't see them, so they don't exist for me. But they see bad things everywhere, many times every day. 


When I was young I had a much darker view. But I deliberately worked to change my view, and gradually it did.