Protection from evil

[anagogy]

Those upon the right-hand path have no such protection against other-selves for upon that path the doughty seeker shall find many mirrors for reflection in each other-self it encounters."

I think that the 'protection' Ra is referencing right here is, in this context, is the potential of others changing or influencing you in some way or another. The negative adept protects his identity (his separation, control, and power) through the sharpness of his negative wisdom. The positive adept doesn't require protection from merging or connecting with others because they welcome the opportunity to unify with their other self, and expand there identity through the natural give and take of human relationship.

In a more colloquial "bad luck/good luck" sense, there is a type of protection that extends from strong polarity (which is tapping into the power of unity), where one is, by spontaneous inspiration, led away from detrimental probabilities towards probabilities more aligned with one's personal conception of 'well being'. This is the type of protection which is provided by the unblocking of prana. Suddenly your cells are better at taking care of your body, there is more pep in your step, you experience synchronicity constantly, your actions go further and are not resisted as much, good luck seems to find you. The universe starts to periodically wink at you, in other-words. Even though we tend to go through varying high and low cycles of this sort of alignment, it is a wonderful incentive to get a taste of the connection that unity has to offer.

It is a magical experience, quite literally.