Sakyamuni has said: “It is so large that it has no exterior, and so small
that it has no interior.”
It means that at the Tathagata level, in terms of largeness, you can’t see the
edge of the universe, and in terms of smallness, you can’t see the smallest
microscopic particle of matter.
Sakyamuni has also talked about the theory of 3,000 boundless universes.
His opinion was that in our Milky Way galaxy (our universe) there are 3,000
planets that have beings.
He has also added that a grain of sand has 3,000 boundless universes in it, so a
grain of sand is like universe.
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