Well, I'm coming from this perspective, so keep that in mind:
Polarization and Polarity
Now, as I've defined it, a person polarizes when they come to the complete experiential knowledge that they are 100% creating their own life (and therefore responsible for ALL of it). This isn't something you can think your way into (that comes later) -- its a deep awakening. Polarity comes during the reflection upon this insight, and one will either focus in their mind on what they have caused to others or what they have caused themselves. They will reflect on both, but eventually, a focus emerges. Around this seed, Polarity arises. It is around this seed that the power is drawn, the edge, the boost that polarity provides.
Greyworking doesn't function, because if one doesn't focus, one has no real battery to draw the extra juice, and more importantly, the mind won't anchor the polarization insight, the awakening, itself, and will eventually sink back down into old patterns, relinquish responsibilty, and fall back into the former sleep.
This is also why I disagree with the notion that what separates the Polarities is this whole love-fear concept. First of all, Darkworkers experience love. They just do. More importantly, the fear idea just doesn't hold up to what we observe in the field, or really, to common logic. But, many people do *initially* come to the path with a lot of fear driving them.
It is something I call Apprentice Gluttony. Having been starved for self-love for so long, and without any real sense of confidence derived from achievement, Apprentices usually show a lot of fear-driven motivation, along with anger, short-sighted hedonism, bravado, arrogance, etc, etc. Its perfectly natural, just like you expect someone without water to binge out once they finally find some fluid, you also see apprentices come in and kinda go splodie on everything. It passes. Either, they fall back from the path, or they go forward and begin to achieve, and develop more self-love, self-confidence, and self-trust, and the "Apprentice Gluttony" fades as they bring themselves back into balance. Normal thing.
But here's the thing, Polarization/Polarity leads to achievement. Repeated success does not amplify the furnace of fear, it douses it. Long-term, we just don't see Darkworkers with a sustained focus on fear. Similar to Lightworkers, we use it as a signpost and an energy to draw from, to push ourselves to shore up weakness, proactively chance our circumstances, etc. But not as a primary force -- in the face of increasing power and competence, fear diminishes.
Far more congruent with what we see is a self-love versus other-love model.