For instance, what we know as colour is the vibration frequency of etheric waves striking on the retina of the eye, between certain definite limits--759 trillions of blows from the maximum, 436 trillions from the minimum--these waves give rise in us to the sensation which the brain translates into colour.

(Why the 436 trillion blows at one end of a nerve become 'Red' at the other end we do not know; we chronicle the fact but cannot explain it.) But our capacity to respond to the vibration cannot limit the vibrational capacity of the ether; to _us_ the higher and lower rates of vibration do not exist, but if our sense of vision were more sensitive we should see where now we are blind.

Following this line of thought we realise that matter may exist in forms unknown to us, in modifications to which our senses are unable to respond.

Now steps in the Eastern Sage and says: 'That which you say _may_ be, _is_; we have developed and cultivated senses as much superior to yours as your eye is superior to that of the jelly-fish; we have evolved mental and spiritual faculties which enable us to investigate on the higher planes of being with as much certainty as you are investigating on the physical plane; there is nothing _supernatural_ in the business, any more than your knowledge is supernatural, though much above that accessible to the fish; we do not speculate on these higher forms of existence; we _know_ them by personal study, just as you know the fauna and flora of your world.

The powers we possess are not supernatural, they are latent in every human being, and will be evolved as the race progresses.