The concept of now is predicated on the idea of time stretching out into the past and future. Given this line of time, "now" marks the point on the line where I am, with the past behind and the future ahead. When do we ever experience the past or future? Only "now". Memories arise... now. Anticipations arise... now. But "now" only has meaning as being distinct from past and future. Once it is seen that the line of time itself is imaginary, what happens to "now"?
The concept of here is predicated on the idea of space stretching out in all directions. Given this concept of space, "here" marks the point in space where I am, with space before, behind, above, below, to the left, and to the right. Where do we ever experience another place, a "there"? Only "here". Ideas of other places arise... here. But "here" only has meaning as being distinct from other places. Once it is seen that the idea of space itself is imaginary, just an idea, what happens to "here"?
What words shall we use to replace the "here" and "now" that we can now see don't exist? And what will we do when we realize that those new words are just more words that don't really tell us anything?