Sun in Cancer
The Sun in the sign Cancer is will through care, protecting one's own, and emotional loyalty. Cancer is the fourth sign of the zodiac, watery, cardinal, ruled by the Moon — an ally of the Sun in the traditional planetary friendships.
The Sun in Cancer holds on to its own circle. Here the will is built so that real strength shows up in care, not in public display.
What this placement means
Cancer under the rulership of the Moon gives two effects. The first is attachment to one's own: a person protects those they consider theirs and gives them a great deal of strength. The second is emotional depth of will: decisions ripen gradually and are made only after careful thought.
The Sun in Cancer needs people close to it. An environment with no circle of its own leaves it without the roots the will normally rests on.
The Sun crosses a sign in about a month, and this is when the yearly highlight of the same channel of will falls: over that month, what's set by the placement in the chart is lived through. Lasting influences come through the slow planets' transits over this sign — Saturn crosses a sign in about 2.5 years, Jupiter in about a year — and through the mahadasha of the Moon as the sign's ruler. A transit of Rahu over the sign lasts about a year and a half and sets a separate layer of restructuring. The houses the Sun falls into in a chart, and the planets it's linked to by aspect, specify which spheres of life sharpen during these periods.
How it manifests
In character — through loyalty. A person with the Sun in Cancer doesn't change their own: their will rests on constancy in relationships.
In behavior — through care. Here the will shows up as a readiness to feed, protect, shelter.
In self-assertion — through family and closeness. The Sun in Cancer proves itself by the safety of those close to it.
What to watch
The strength is the ability to create a safe space. Where protection and care are needed, the Sun in Cancer works naturally.
The weak point is being closed to the outsider: attachment to its own circle turns into difficulty widening it and letting new people in.