Sun in Scorpio
The Sun in the sign Scorpio is will through depth, endurance, and transformation. Scorpio is the eighth sign of the zodiac, watery, fixed, ruled by Mars — an ally of the Sun in the traditional planetary friendships.
The Sun in Scorpio goes to the bottom. Here the will is built so that the superficial is almost an insult to the person, and they work only with what can hold the full depth.
What this placement means
Scorpio under the rulership of Mars gives two effects. The first is piercing insight: a person sees what's being hidden from them and doesn't look away. The second is a renewing force: here the will shows up as a readiness to destroy what's outlived its time and not cling to the old.
The Sun in Scorpio needs the truth. A setting where everything is hidden and smoothed over gives it no support to hold its will 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 Mars 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 composure. A person with the Sun in Scorpio doesn't give away their state: their will rests on an inner core.
In behavior — through totality. Here the will shows up as a readiness to go all the way to the outcome, even a hard one.
In self-assertion — through transformation. The Sun in Scorpio proves itself by what has passed through it and come out renewed.
What to watch
The strength is the ability to work with the depths. Where taking a hit and transforming the difficult is needed, the Sun in Scorpio works naturally.
The weak point is vindictiveness: piercing insight turns into keeping score against those who've wronged it.