If we regard the gradation of worlds or planes as a whole, we see them as a great connected complex movement; the higher precipitate their influences on the lower, the lower react to the higher and develop or manifest in themselves within their own formula something that corresponds to the superior power and its action. The material world has evolved life in obedience to a pressure from the vital plane, mind in obedience to a pressure from the mental plane. It is now trying to evolve supermind in obedience to a pressure from the supramental plane.
These three together, mental, vital, physical, are called the triple universe of the lower hemisphere. They have been established in the earth-consciousness by evolution but they exist in themselves before the evolution, above the earth-consciousness and the material plane to which the earth belongs.

We are all the time living and acting on other planes of consciousness, meeting others there and acting upon them, and what we do and feel and think there, the forces we gather, the results we prepare have an incalculable importance and effect, unknown to us, upon our outer life.

A mightier task remained than all he had done.
To that he turned from which all being comes,
A sign attending from the Secrecy
Which knows the Truth ungrasped behind our thoughts
And guards the world with its all-seeing gaze.