Psychology is about understanding people – ordinary people as well as people who are extraordinary or special in some way. Psychologists study how the mind works, and why we do the things that we do. That doesn’t mean, though, that studying psychology gives you an instant knowledge of how people think. People work on so many levels and everyone is so different from everyone else that nobody could possibly know everything about even one other person. But we can know a few general things which are helpful in understanding people.