This understanding and idea comes mostly from Bryon Katie and her amazing tool for awakening called The Work. It is essentially 4 questions that lead you to discovering within yourself that the seemingly solid beliefs we have are not as true as they might seem. Until we question them, however, they are as real as we make them and they can have a huge influence on our lives. While just "pretending" to yourself that they don't really exist or that they're false does not really change anything in the way you feel overall, looking truthfully at the thoughts and beliefs you have and questioning their validity can have remarkable effects.
For those who want to get started on learning this FREE technique, here is the link to the how-to on the official site. http://www.thework.com/thework-4questions.php
When you really question your thoughts, you'll find your mind freeing up in a way that gives you a new perception of your life. You might even find a sense of contentment beyond what any object can really give you. This expanded way of living is true inner freedom and you can access it at any time. It (you) lies just beneath your thoughts and feelings.