Let no man.. despair because he thinks the task too great for him; what man has done man can do, and just in proportion as we extend our aid to those… - Charles Webster Leadbeater

Physical. First, then, as to the physical part of the mechanism. We have in our bodies a great central axis of nervous matter, ending in the brain, and from this a network of nerve-threads radiates in every direction through the body. It is these nerve-threads, according to modern scientific theory, which by their vibrations convey all impressions from without to the brain, and the latter, upon receipts of these impressions, translates them into sensations or perceptions; so that if I put my hand upon some object and find it to be hot, it is really not my hand that feels, but my brain, which is acting upon information transmitted to it by the vibrations running along its telegraph wires, the nerve-threads. Chapter 2

Surely these experiments show very clearly how the remembrance of our dreams becomes so chaotic and inconsequent as it frequently is. Incidentally they also explain why some people — in whom the ego is undeveloped and earthly desires of various kinds are strong — never dream at all, and why many others are only now and then, under a collocation of favourable circumstances, able to bring back a confused memory of nocturnal adventure; and we see, further, from them that if a man wishes to reap in his waking consciousness the benefit of what his ego [higher self/soul] may learn during sleep, it is absolutely necessary for him to acquire control over his thoughts, to subdue all lower passions, and to attune his mind to higher things. Chapter 7

To anyone who has even a faint idea of what the powers at the command of an adept really are, it will be at once obvious that for him to work upon the astral plane would be a far greater waste of energy than for our leading physicians or scientists to spend their time in breaking stones upon the road. The work of the adept lies in higher regions... where he may direct his energies to the influencing of the true individuality of man, and not the mere personality which is all that can be reached in the astral or physical world. The strength which he puts forth in that more exalted realm produces results greater, more far-reaching and more lasting than any which can be attained by the expenditure of even ten times the force down here; and the work up there is such as he alone can fully accomplish, while that on lower planes may be at any rate to some extent achieved by whose feet are yet upon the earlier steps of the great stairway which will one day lead them to the position where he stands.