What does polarization mean? Are there 3 polarities?

[Infinite]

So you are saying polarization is more about the usage of intelligent energy?  

I'm talking in a general manner. Everything is about use intelligent energy:

27.5 Questioner: It is not necessary to divide it. The definition of intelligent infinity as one part is sufficient. Could you please now define intelligent infinity?

Ra: I am Ra. This is exponentially simpler and less confusing. There is unity. This unity is all that there is. This unity has a potential and kinetic. The potential is intelligent infinity. Tapping this potential will yield work. This work has been called by us, intelligent energy.

The nature of this work is dependent upon the particular distortion of free will which in turn is the nature of a particular intelligent energy or kinetic focus of the potential of unity or that which is all.

27.7 Questioner: Now I think I have extracted an important point from this in that in intelligent infinity we have work without polarity, or a potential difference does not have to exist. Is this correct?

Ra: I am Ra. There is no difference, potential or kinetic, in unity. The basic rhythms of intelligent infinity are totally without distortion of any kind. The rhythms are clothed in mystery, for they are being itself. From this undistorted unity, however, appears a potential in relation to intelligent energy.

In this way you may observe the term to be somewhat two-sided, one use of the term, that being as the undistorted unity, being without any kinetic or potential side. The other application of this term, which we use undifferentiatedly for lack of other term in the sense of the vast potential tapped into by foci or focuses of energy, we call intelligent energy.

But, this is the most accurate passage in LOO about polarity:

19.20 Questioner: Well, this would seem then that there is a relationship then between what we perceive as physical phenomena, say the electrical phenomena, and the phenomena of consciousness, and that they, having stemmed from the One Creator, are practically identical but have slightly different actions as we [tape ends.] [Is this correct?]

Ra: I am Ra. Again we oversimplify to answer your query.

The physical complex alone is created of many, many energy or electromagnetic fields interacting due to intelligent energy; the mental configurations or distortions of each complex further adding fields of electromagnetic energy and distorting the physical complex patterns of energy; the spiritual aspect serving as a further complexity of fields which is of itself perfect but which can be realized in many distorted and unintegrated ways by the mind and body complexes of energy fields.

Thus, instead of one, shall we say, magnet with one polarity you have in the body/mind/spirit complex one basic polarity expressed in what you would call violet-ray energy, the sum of the energy fields, but which is affected by thoughts of all kinds generated by the mind complex, by distortions of the body complex, and by the numerous relationships between the microcosm which is the entity and the macrocosm in many forms which you may represent by viewing the stars, as you call them, each with a contributing energy ray which enters the electromagnetic web of the entity due to its individual distortions.

There is not a polarity in the chakras, or its not a certain configuration of chakra activation?

I see that the key to understand the both polarity in terms of energy centers is the green-ray energy center or cardiac chakra. The STO entity will seek balance all the chakras to open the gateway to intelligent infinity. STS entity will negates the green-ray to open the gateway. The first will radiate your energy, the latter will absorb energy from others. Here Ra explain this clearly:

85.11 Questioner: Then the [service-to-self] path have potentiated that which is not. Could you expand that a little bit so I can understand it better?

Ra: I am Ra. If you see the energy centers in their various colors completing the spectrum you may see that the [service-to-self] choice is one which denies the very center of the spectrum; that being universal love. Therefore, all that is built upon the penetration of the light of harvestable quality by such entities is based upon an omission. This omission shall manifest in fourth density as the love of self; that is, the fullest expression of the orange and yellow energy centers which then are used to potentiate communication and adepthood.

When fifth-density refinement has been achieved that which is not is carried further, the wisdom density being explored by entities which have no compassion, no universal love. They experience that which they wish by free choice, being of the earnest opinion that green-ray energy is folly.

That which is not may be seen as a self-imposed darkness in which harmony is turned into an eternal disharmony. However, that which is not cannot endure throughout the octave of third density and, as darkness eventually calls the light, so does that which is not eventually call that which is.

75.23 Questioner: I am sorry for the confusion. Sometimes, as you say, sound vibration complexes are not very adequate, and I’m sorry.

You made the statement in a previous session that the true adept lives more and more as it is. Will you explain and expand upon that statement?

Ra: I am Ra. Each entity is the Creator. The entity, as it becomes more and more conscious of its self, gradually comes to the turning point at which it determines to seek either in service to others or in service to self. The seeker becomes the adept when it has balanced with minimal adequacy the energy centers red, orange, yellow, and blue with the addition of the green for the positive, thus moving into indigo work.

The adept then begins to do less of the preliminary or outer work, having to do with function, and begins to effect the inner work which has to do with being. As the adept becomes a more and more consciously crystallized entity it gradually manifests more and more of that which it always has been since before time; that is, the One Infinite Creator.

There is not a polarity in the chakras, or its not a certain configuration of chakra activation?
My understanding is that polarization is a byproduct of how the mind is configured.  Actions and thoughts are also a byproduct of how the mind is configured.

The mind have a main role. But I see each being as a mind/body/spirit complex. So, I generalize saying that the direction of thoughts and actions determines the polarity.

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And off-topic question:

Even on the Tree of Life, the heart chakra can be roughly placed at Tiphareth which is the center of the Tree.

Can you make a relationship of sephiroth and energy centers?

I know that Malkhuth = red-ray energy center and Kether is the violet-energy center.