This period highlights an old role that may interfere with clear expression. A familiar reaction seems convenient, but takes energy. The Sun demands living participation, the South Node pulls toward the habitual script, and the square shows the price of automatic behavior, guilt, fear, fatigue, dependence, and inner loyalty to the past.
The square of the Sun to natal South Node may appear through the repetition of an old conflict, the return of a former theme, guilt, a duty from the past, or the desire to prove an old rightness. This is not punishment and not a rollback. It is a moment to see where experience has become a chain.

