The choice of polarity is not made, but HELD

[AnthroHeart]

19.16 Questioner: Then, through free will, some time in the third-density experience, the path splits and an entity consciously— probably does not consciously choose. Does an entity consciously choose this path at the initial splitting point?

Ra: I am Ra. We speak in generalities which is dangerous for always inaccurate. However, we realize you look for the overview; so we will eliminate anomalies and speak of majorities.
The majority of third-density beings is far along the chosen path before realization of that path is conscious.

I wonder if far along the path means greater than 50% polarized STO if that's your path.