In E-Squared: Nine Do-It-Yourself Energy Experiments That Prove Your Thoughts Create Your Reality, author Pam Grout postulates that we see what we expect to see. It sounds sort of obvious, but go beyond that first reflexive response to get to the deeper truth: all the things we habitually think about show up for us, every day. Piece by piece, moment by moment, they make up our experience of life.
Leave aside arguments about whether or not that’s because we manifest them with our thoughts. Just consider that if you are thinking about seeing yellow cars, you’re probably going to notice yellow cars. Which is fine, of course. Unless it would serve you better to see/find an orange car, in which case, you may be blinding yourself to it.