Many years ago, I attended a Dharma talk on nonattachment.  The monk explained the teaching by discussing the importance of having bare walls. He explained that if we decide that we want to hang a picture on the wall, that requires us to buy a frame for the picture.  Then we have to get a nail and put a hole in the wall.
What if we put the nail in the wrong place, and we miss the stud?
Even if we hit the stud and hang our picture successfully, now we have wonder if the picture is centered properly...