When I was growing up, I thought the phrase "picture it in your mind's eye" was just a figure of speech, because I've never been able to picture anything in that way -- when I close my eyes and try to imagine something like an apple or a sunset, or even the face of a loved one, it's just black. If this sounds familiar, you might have #aphantasia https://mathewingram.com/work/index.php/2020/04/05/aphantasia-when-you-try-to-picture-something-in-your-mind-and-nothing-happens/