You create your own imaginary boxes simply by living life and accepting certain things as “real” when they are just as illusory as the beliefs of a paranoid delusional. The difference is, enough people agree that certain man-made concepts are “real,” so you’re viewed as “normal.” This is good for society overall, but it’s that sort of unquestioning consensus that inhibits your natural creative abilities. So, rather than looking for ways to inspire creativity, you should just realize the truth. You’re already capable of creative thinking at all times, but you have to strip away the imaginary mental blocks (or boxes) that you’ve picked up along the way to wherever you are today.

- Do You Recognize These 10 Mental Blocks to Creative Thinking? | Copyblogger