The difference between imagination and actuality
Reality is Infinite; anything imagined is actual, but it's not actual where it's imagined, and it’s not imaginary where it's actualized.
The difference between imagination and actuality is itself contained within the set called imagination. The difference, as imagination, is unified with actuality in the present, but the key is that it's actual as imagination, since that is what it actually is. If you observe carefully, everything you believe about reality is technically imaginary, and yet, the truth is what is actual, functioning as awareness in the most immediate sense, but functioning also as that which you are aware of (AKA reality) in a seemingly less immediate sense. It all unifies in the present.