If one removes the concept of "time" entirely and substitute it with the word "change" which is not a concept, it can be more easily understood how this ever changing moment is all the time that ever existed and ever will exist.
One simply does not need "time" to explain the universe at all. Only change is required. I type one letter sfter another. It does not require time. It requires change.

Time it seems to me, does not really exist other than as a concept. It really points to change, which can stand on its own, without the concept "time" attached to it.

There is only now. There is no past, and there is no future. There is only ever now. No other time has ever existed.

So.. this timeless eternal moment. What do you think it is? Well. It is you, obviously. You're part of it aren't you?

You're it.