We block out a great deal of information that is potentially available if it does not fit our needs, expectations, preconceptions, and prejudgments.
We do not passively register information. We select out from the available data what we are capable of registering and classifying, based on our language and culturally learned concepts as well as what we want and need. To put it more dramatically, we do not think and talk about what we see; we see what we are able to think and talk about.
Humble Inquiry, Edgar H. Schein.