“They had visioned the Great Reality” (Page 161, Big Book)
Is the world real?
If you look up at the stars, and see a constellation, the stars are indeed there, and measurable. But the constellation is a construct in the mind of the viewer: the stars have no intrinsic relationship with each other, or, rather, such relations as there are remain invisible to this ordinary viewer, who imposes their own magical vision on them, seeing scorpions, ploughs, and bears.
Reality is the universe. The world is the construct of astrology.