William Enckhausen defines half of these vrittis as spiritual ignorances and half spiritual developments. "Half the 12 vrttis of the Anahata are 'positive', growth promoting vrttis and the other half are 'negative' or at most neutral, self-justifying defense tendencies that perpetuate the ego's limited boundaries instead of expanding and refining them. There is still a limited and bounded sense of self, but with the potential to discriminate between vice and virtue. There is also still the boundary of self and not self to be overcome, although not as marked as in the Manipura and Svadhistana. Harmony, balance, and proportion are key elements in this fulcrum that is the Anahata to help determine what is growth-promoting and virtuous (self, or good for the self) and what is vice, or inappropriate for spiritual self-growth (not self)." Enckhausen's translations follow.