It's a weird thought, but as human beings, we do 'think about what we think'; we 'know about what we know'. This process is known as Metacognition, and is our own ability to have an awareness of our cognitive processes when we are learning. It's not a bad thing, but a useful mechanism. When we are given a job to do, we can make our thinking clear and thus choose the correct response, which allows us to experience success. The theory has great significance to everyone of us - we all rely on it, even if this is a subconscious effort.