Reality...

There are three stages on the path of world enquiry. The first yields
as its fruit that the world is but an idea, and this stage has been
reached from the metaphysical end by thinkers such as Bishop Berkeley,
and nearly reached from the scientific end by such a man as Eddington.
The second stage involves the study of the three states, waking,
dreaming, and deep sleep, and yields as its fruit the truth that ideas
are transitory emanations out of their permanent cause, consciousness.
The third stage is the most difficult, for it requires analysis of the
nature of time, space, and causation, plus successful practice of yoga.
It yields as its fruit the sense of Reality as something eternally
abiding with one. — Notebooks Category 19: The Reign of Relativity >
Chapter 0: Introductory Paras > # 1... Paul Brunton