Sometimes what you really need is only imagined, then creating the image from the visions inside your head is the only way to proceed. When well illustrated, the meaning becomes quite clear. What is it you wish to communicate?
It is not always possible to get just the right shot at just the right time to create the mood or convey the message, but creating just the right image is possible through the magic of photography and its creative manipulation. If a project calls for drama or whimsy, this is a very useful skill. Discussing your project is the best way to start.