(This excerpt is from the book WITHIN YOU IS THE POWER by Henry Thomas Hamblin, first published in the 1920’s and is now in the public domain.)
We have already seen that the sub-conscious mind, wonderful though it be, is instinctive merely, lacking inspiration and what we call originality.
All inspiration comes from the Universal Mind, via the super-conscious. All poets and inspired writers get their inspiration in this way. The higher mind is not recognized by Psychologists, but it has long been known to searchers of spiritual truth.
What we get from the sub-conscious is the outcome of facts and knowledge supplied to it. What we get from the super-conscious is direct inspiration from higher planes. This higher mind might also be called the Mind of Illumination, for those who can enter into it become illumined, being able to know the Truth and to see things as they really are, and not as they falsely appear to the senses.
This limited consciousness in which we live is bounded by our five senses. The universe that we see around us is partly real and partly an illusion. The real universe is Spiritual and infinite: what we sense is a limited, partial conception of a fragment of it. Our limited, finite conception of the universe is entirely misleading and erroneous, and so long as we rely on sense evidence and the human mind, we remain in darkness and uncertainty. When, however, we can rise into the super-conscious realm, our consciousness expands, transcending the senses and the limitations of the physical plane.
The Spiritual mind is, of course, only accessible to those who are more delicately attuned to its finer vibrations. Nothing that is worth having can be had without effort, and it is only after much self-discipline that it becomes possible for the student to raise his consciousness to this higher realm and understand life from the standpoint of the Universal Mind.
There is nothing, either mystical or psychical, about the use of this higher mind. One who makes use of it becomes spiritually-minded, that is all. He does not go into trances, nor need he become clairvoyant: he simply remains a sane, normal individual, with this difference only–he makes use of more of his mind than does the ordinary individual. (more…)

