Manas, (Sanskrit, "mind") in Sanskrit means literature, mind, the coordinating organ of intelligence, thought, understanding, perception, and will. In Vedic times manas meant the individual spirit and the basis of speech (vac).
"Manas has been defined as mind, or that faculty of logical deduction and reasoning, and of rational activity that distinguishes man from the animals.
Manas ― Higher mind.
Mantram ― Formula or arrangement of words or syllables which, when correctly sounded, invokes energy.
Manas (Sans.) Lit., the "Mind." The mental faculty which makes of a man an intelligent and moral being, and distinguishes him from the mere animal; a synonym of Mahat. Esoterically, however, it means, when unqualified, the Higher Ego or the sentient reincarnating Principle in man.
Manas The mind, the mental faculty, that which distinguishes the human from mere animal. The individualising principle; that which enables the individual to know that he or she exists, feels and knows. Divided into two parts - higher mind / lower mind.
MANAS IN ACTIVITY
We have already seen that the fifth principle is dual in its aspect during each period of earth-life, and that the lower Manas united to Kāma, spoken of conveniently as Kāma-Manas, functions in the brain and nervous system of man.
After the detail of the Astral plane, it is disappointing that (at least in the surviving notes) Blavatsky neglects to describe the other five "Terrestrial" planes. However, reference is made to "consciousness proper" which begins between Kama (Fourth plane) and Manas (5th plane) [p.
Manas - a Sanskrit term for a higher or abstract mind - the principle of creative intelligence. "Manas" is the root of the word "man" (not in a gender exclusive sense) and means the entity which thinks.
MANAS or Manasic Principle - MANAS - Intelligence, the higher human mind, whose light or radiation links the Monad for the lifetime to the mortal man. The Mind, the mental faculty; that which distinguishes man from animal.
MANASA-DEVA Mental or causal deva. Often also denotes essential devas (the Augoeides).
MANASA-PUTRA (Skt, son of mind') A general designation of an individual in a superhuman natural kingdom. Such a one is always a member of some expanding collective being.
Manas, the derivation or product in a reflected form of Ahankara, "the conception of I," or Ego-ship. It is, therefore, when inseparably united to the first two, called the Spiritual Ego, and Taijasi (the radiant). This is the real Individuality, or the divine man.
Brahmanas at once become like those who have conquered their passions, and lower castes become equal to Brihmanas: therefore let all worship those initiate in the Brahma-Mantra, and thus possessed of Divine knowledge (151).
Born from the interaction of atman, buddhi, and manas, kama per se is a colourless force, good or bad according to the way the mind and soul use it. It is the seat of the living electrical impulses, desires, and aspirations, considered in their energetic aspect.
He visited Western Tibet and joined pilgrimages to Mt Kailas and Lake Manasarovar. "Those places", he wrote, "deserve to be sacred, if for nothing else, for the natural beauty God lavished on them in the luckiest days of His creation" (72).
If people's desire bodies (lower manas and emotional bodies) can be manipulated cleverly and easily into buying an idea or product that in most cases they don't really need, then we will continue to maintain a materialistic culture bent on using up as many resources on the planet as possible.
The higher being bodies of Gurdjieff would correspond to Manas and Atman. In other words, the formation of these would correspond to refinement of emotions and of intellect, corresponding to access to the corresponding higher centers.
See also: What is the meaning of World, Spirit, Ritual, Spiritual, Light?