It's true. Your brain really does register what you want to see, not what is actually there.
Was editing an article entitled Your foot in His hand but throughout the entire process, the understanding that I got from the title was Your foot in His mouth.
It wasn't only after a few minutes, when I'm almost done editing the article, that I realised my understanding of the article is actually very different from what was actually there.
How careful are you when you read things? Do you truly understand what they're supposed to mean?