“Mr. Old: I merely wish to show, reasoning by analogy, just as there was the conscious and unconscious action of the physical body, and there were conscious and unconscious systems of nervation and so forth on the physical plane, so there was in every principle this conscious and unconscious, this dark and light side.
Mme. Blavatsky: I think you confuse the material things with the spiritual.
Mr. Old: We know every one of those principles has a manifesting and an unmanifesting side.
Mme. Blavatsky: If you speak of one of the acquired habits, as nursing your thumbs, it is a different thing. It is not a thing which is natural and normal. The beating of the heart is a thing which pretends to the physical, the habits of men. This has nothing to do with acquired things.
Mr. Kingsland: It has nothing to do with the acquired habits in this incarnation. But you can trace back the beating of your heart, which takes place automatically; you can trace that back to the evolution, where it was first.
Mme. Blavatsky: Certainly.
Mr. Old: I cannot go so far as that.
Mr. Kingsland: Suppose we take your analogy?
Mr. Old: Reasoning from this by analogy, on this line I wanted to show that there would be conscious and unconscious thought, both identified with and peculiar to the Manas.
Mr. Kingsland: Very well, let us say that. Then I say that the conscious thought you are going through now is your present intellectuation.
Mr. Old: We have already identified intuition with Buddhi. Now you wish to identify Buddhi with the higher aspects of Manas.
Mr. B. Keightley: You are taking that from Sinnett, Old.
Mr. Old: Is not Buddhi the sixth principle, and is not intuition the sixth sense?
Mme. Blavatsky: You argue on the line of what? Do you bring the thing as it is given to you in the esoteric instructions, or the exoteric? There is the difference, you know what I mean? Exoterically, there is another thing. Of course, the Buddhi will be the sixth, for the Buddhi is quite a different thing, exoterically.
The Buddhi, per se, has nothing to do with any qualification of anything; it is simply the vehicle of Atman, of spirit; and spirit is nothing; it cannot be said it is something; it is that which has neither beginning nor end; it is the one thing.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 