My current definitions of the rays and their blockages

[anagogy]

how is it possible for blockage (which I associate with impaired functioning), to lead to the physical health and vitality which many negative entities exhibit?

54.22 A negatively oriented individual mind/body/spirit complex will ordinarily program for wealth, ease of existence, and the utmost opportunity for power. Thus many negative entities burst with the physical complex distortion you call health.

in my understanding, energetic blockages inevitably lead to disease. (both mental and physical unease)

The blockages that destroy health, and the blockages of a given energy center are different (though sometimes they coincide).

Consider our fellow 2nd density terran denizens for example.

They are blocked in a yellow ray sense, until enough catalyst is experienced to propel them over the vibrational threshold and into yellow ray vibratory expression. However, many animals are vibrantly healthy. So from this example we can see that the spiritual blockage in and of itself does not negate physical health.

The blockages that destroy health are the blockages of the flow of life force, or desire. When desire is consistently negated, it drains our life force (to the degree that the desire was strong), and bodies become, gradually, more and more distorted, or compromised, in function.

Polarity is a function of desire. If a negatively polarized entity experiences negative emotions, it is because they are losing control. Ra has stated that things like cancer, for example, arise due to not using catalyst in an effective manner (to polarize towards our desires). So a negative adept controls the situation causing the anger, or the anger itself, and channels it into some way of controlling whatever situation is giving rise to the negative emotions which are symptomatic of blocked desires. Once control is reestablished, life force is no longer being blocked.

Life force is increased by doing things you like to do, eating things you like to eat, etc. That is why Carla, during the Ra contact, was given no hard and fast rules of diet, but only loosely guided in that department towards those things she enjoyed.

In the same sense, if a positively polarized being fails to accept, or love, some catalyst they are consistently experiencing, it will gradually bleed them of life force until some physical, mental, or emotional malady manifests in their experience.

In the unpolarized being, like our 2nd density friends, or 3rd density newbies, they, just like polarized entities, seek actualization of their desires and that smooths the resistance that blocks the reparative life force energy from flowing.