When we read or hear something, the first thing that happens in our minds is energy preservation — the mind tries to make sense of the information and categorize it into patterns.
The brain uses whatever we already "know" to rationalize the new input.
Basically, we don’t truly listen or try to understand what we’ve heard — it’s too energy-expensive. We group new information with old "knowledge", effectively discarding it. And if it doesn’t fit anywhere, we simply ignore it.
This is why most people are stuck inside their delusional worlds built on false beliefs.