The image in the above link (Oops...sorry...I couldn't post the link - you can go to google and search "Narayana Multiple Universes" and see the image) - is what I feel as "Brahman" and "Maya"....First I thought that - may be the "lotus" from the navel is the Universe.....But not so. The Saguna Brahman is formed from Nirguna Brahman and sits in Lotus...Dreams....Those Dreams are different Bubbles....
Each bubbles - are each universe...Those bubbles are space-time...It forms as a "Maya"...goes on expanding now...
When some hole in the bubble is found - it is nothing but "Black Hole".... and through that hole - many universes link can be found - and this is what the scientists are up-to...
When we realize that - we, 'bubble', because of "Maya", a 'drop' in the vast ocean of "Brahman" and then realize/enlighten that we are the 'ocean' itself....then we are not the "Bubble" or "drop" anymore...
The sages come from nowhere...I feel how it is possible is, they create space-time and elements,atoms - and forms a body in the place they want to appear....then when the purpose is finished, like how black hole is formed by reducing the distance of electrons by colliding each other in 10 to the power -33, the electrons are absorbed by a black hole formed... the sages also does that way - to collide the electrons - make it disappear into the black hole - so their presence in a body form is gone away....
Always in religions - they raise up the hand and say "God is out there"....We thought it as childish...But now I see why it is...We are inside the bubble...Earth is rotating...wherever we point the hand - it will go outside the Bubble and without him there can be no Bubbles....So we point the hand to the "Brahman/God" outside the Bubble....They were/are right...God is there - as we are in a bubble...when we out of the bubble (i.e. enlightened from ignorance/Dreams) - then presence of "I AM" is felt...
The Background is the "Brahman" - and the Bubbles(Universes) are created as a "Maya" in it...One day bubbles too expanding will contrast - in Maha Pralaya...But this "Lila" will go on continuously....