How do we use the Zodiac Subdivisions (aṁśa) in our interpretations? Let’s start right out with an example. My ascendant is 25º Capricorn, which places it in the Leo navāṁśa. Now, how do you interpret this?
First, do it in a straightforward way. “This person is Capricorn with a subtext of Leo.” Birth chart is the context, subdivision is the subtext. Thus Capricorn is the main context of the ascendant, but the subtext is Leo. In interpretive language this would express itself with phrases like, “I am decisively (Leo) stubborn (Capricorn), spiritually (Leo) practical (Capricorn), and charismatically (Leo) critical (Capricorn).”
If I was born a bit later, when the Ascendant had gone into the Virgo navāṁśa, how would the interpretation change? It would become something like, “I am fastidiously stubborn, carefully practical, calmly and exactingly critical.”
The same formula works for interpreting the planets, with the addition of the need/opportunity to interpret house placements.
For example, the most important planet in my chart is Jupiter – at 28º Libra in the 10th house, putting it in Geminī, 11th house of the navāṁśa. How do we interpret?
Start with the context, then add the subtext.
The context is the main chart. Jupiter in Libra, 10th house. So the career (10th) has to do with philosophy or religion or ethics (Jupiter) and has a progressive, liberal, egalitarian, down-to-earth flavor (Libra).
The subtext is the sub-chart. Jupiter in Gemini, 11th house. This means the ability to communicate (Gemini) knowledge and philosophy (Jupiter in Gemini) in an entertaining, artistic format (11th house).
So, putting the context and subtext together: The liberal ethical career makes use of entertaining/artistic verbal communication of knowledge and philosophy. Indeed, my main career is that I write novel-like translations of Sanskrit spiritual literature. My secondary career is that I constantly write and talk to people about their lives, as an astrologer. Both of these careers follow the prediction very closely.
— Vic DiCara