The Sun in Cancer does not shine outward so much as it draws inward and warms what it holds.
This is Cardinal Water: the initiating impulse of feeling itself. Where Aries begins with action and Capricorn with structure, Cancer begins with the tide — a movement that has direction but no straight line. Everything here waxes and wanes. Everything returns.
In the cycle of the three waters, Cancer is the return. Pisces dissolves the drop into the ocean; Scorpio holds it in the dark, under pressure; and Cancer is where the individuated self is conjured and carried back to shore to begin its search for connection once more. Every Cancer Sun is someone who has just arrived from somewhere vast, still carrying the memory of it, looking for a place to put it down. (I write about this cycle at length in
Water — The Memory of Time.)
The work of a Cancer Sun is to find where that tide belongs, and to build something that can hold it.