You are either holding back or giving everything. You have never found the setting in between.
What it looks like in a life
You do this in relationships first. You keep your needs small and quiet, then find someone enormous: generous, loud, full of plans, taking up all the air. Or you become that person and find someone who needs constant tending. Either way you are living one half and watching the other half walk around inside somebody else. You alternate in seasons too. Years of careful, contained living, then a stretch where you throw everything at a move, a person, a belief. Your family probably ran on the same seesaw, one parent holding the floor and one parent reaching for more.
The gift
You understand both ends, which almost nobody does. You know what it costs to want more and what it costs to make do. That makes you unusually good at translating between a cautious person and an expansive one, in a family, in a business, in a marriage. When you do hold both at once, the result is large: real appetite with a real floor underneath it.
The friction
You project. Whichever side you are not living, you go find in another person, then resent them for doing it badly. The generous one is reckless, the careful one is small, and you are always at the opposite pole telling yourself you are the reasonable one. Meanwhile your own need goes unmet, because you handed half of yourself to somebody else and called it a relationship.
The esoteric layer
The opposition is half the circle, harmonic two, the geometry of polarity. Hellenistic authors classed it as disharmonious. The esoteric reading is full-Moon logic: the two poles held in tension until a third, reconciling point is found, which is why the tradition treats this aspect as relationship taken up as a practice. Jupiter is the greater benefic and the Moon is the body's oldest habit. Held apart, they argue over how much is allowed. Held together, they are the same instinct at two volumes.
Where this goes
The sign polarity involved says exactly what the two ends are arguing about. A therapeutic astrology session works that seesaw directly, because this pattern almost always traces back to the house you grew up in.
Related
See it in your own chart
Cast your chart free and read this placement next to everything else you carry.