dictionary.com states in part: unique (adjective): existing as the only one or as the sole example; single; solitary in type or characteristics: "a unique copy of an ancient manuscript."
There will never be another you. There will never be another me. Each of us is unique in all of Existence. Not only that, our interactions between each other are unique. Your uniqueness is one of your greatest gifts that you can share with those around you and with the world at large. In the past, society tried (and to a lesser extent today) to fit everyone into the same box. Instead, be like a cat and fit in a variety of boxes. Let your uniqueness shine.
For today, I remember that I AM Unique. I AM That.