“Not only do we tend to think about the world according to what we want to see and what we need to see, we tend to think in terms of what we expect to see.”
I think this is true because if we expect to see something we may focus on seeing just that thing. Critical thinking allows you to gather more information and focus on the important pieces. By focusing on the important parts of the information we can see more of what is true than what we want to see or expect to see. This is good because without critical thinking you can have a hard time figuring out what it is true and what you think should be true or expect to be true. Without those skills we cant gather reliable information or write things without bias.