Imagine v: to form a mental image of something not actually present to the senses. I would think that each one of us has used this phrase many, many times.  To me, the question is, what does it really mean?  To “form a mental image of something NOT actually present”, what does that mean?  Something is not present, and you’re trying to form an image of something that your brain is trying to create, out of what, memory, your concept of perception, a metaphor for something that you do know???  It’s weird, something is said, and we say, ( or maybe just think), “I can only imagine”.  Imagine what?  Good…