Yes I do see creation as part of the picture, but because we're looking at a yin polarity perhaps it is more about the matrix which makes creation possible. So with Cancer the matrix is biological and instinctual, and with Capricorn its about legality, tradition, politics, class structure, etc.
And then perhaps 'having found our feet' biologically and socially we can go on to create an identity as an individual in the 5th and as a participant/reformer in the 11th.
Greene has Sun and Mercury in Virgo - Moon in Sagittarius though, and with a Venus Jupiter conjunction in Libra.
'Boundaries' is interesting. In the 7th house we meet others as separate individuals, and don't lose our boundaries until the 8th house kinds of relationships. And in the first house we are striving to assert our independence following the 12th.
Interactions take place across boundaries. If there is no boundary of any kind, then there aren't two separate entities to interact with one another - there's just one entity.
But a boundary is static, and the 1st and 7th houses are yang and angular, so bring in the dynamism and I'm back to 'interaction'. Maybe for me, that's the closest word I'll find.
LOL I have Gemini sun and Mercury and many years ago, I had read somewhere that Liz Greene was a Sag sun. I felt like she comes across too Sagittarian so finding that that she really has a Sag moon is very fitting. Although Virgo Mercury is dignity along with Gemini Merc, they're really different and probably contentious. Like I said, I find her writing very entertaining and food for thought but can't really take it seriously.
Ahhh yes, "origins" seem to be an adequate descriptive word for the 4/10 axis.
Yes, I understand that 1/7 is angular and is interested in initiation but it doesn't have to "interact" in order to initiate.
I came up with "boundaries" for 1/7 axis because both houses have the biggest issues dealing with boundaries. The 1st house is only concerned about the self so it's boundaries or rather, limits, is confined to 1 space (self/inside). With the 7th house boundaries is about what goes on outside of the self which is other people, communities, society. In that case, I lumped the other/outside parties as 1 entity. The 1st cannot be independent if it does not learn to govern its given space (the self) to even motivate itself to be independent and the 7th cannot survive in the outside world if it didn't acknowledge, focus, and mimic what happens out there. The question still remains, at what cost? The answer lies within the boundaries and limitations that the 1/7 axis proposes: self reliance or integrate with others?
I would put interactions with 2/8 axis (even though substance is the core it) because the 2nd is when you interact with your things and the 8th is when you deal with other people's things. But don't forget- 2nd houses the self-esteem/self-worth. 8th houses what you value outside of yourself (objects, people, etc.)