What this line mean? Is all that we see or seem But a dream within a dream?

Question

This is from Edgar Allen Poe's Dream Within a Dream.

Answer 1

Best Answer - Chosen by Voters

Imagine you are dreaming, and in your dream you are dreaming, and in that dream, you are exactly who you are right now.

Answer 2

Some people believe that we each "imagine" our own world, and that it is only in our mind that it even exists.