Libra is the Sun's fall, and that difficulty is a genuine one: the Sun wants a strong, separate self, while Libra instinctively defines itself through someone else. A Libra Sun often discovers who it is by reflection - in a partner's eyes, a friend's reaction, the shape of a relationship - and can feel oddly unformed when there's no one around to relate to. The task named by the fall is building a centre of gravity that doesn't depend on company.
The gift for harmony
None of which cancels the real gifts. A Libra Sun has an almost physical need for harmony and a genuine talent for creating it: reading the room, easing the tension, finding the fair compromise, making other people feel at ease. It's drawn to beauty in nearly every form and tends to move through the world with charm and grace, allergic to ugliness, cruelty, and the raised voice.
What the peacemaking costs
The shadow is what all that peacemaking costs. A Libra Sun can be so busy weighing every side that it can't decide anything, so eager to be liked that it says yes when it means no, so conflict-averse that resentment builds up quietly behind the pleasant smile. It can mislay its own opinion inside other people's, or lean on a relationship to supply the sense of self it hasn't yet built alone.
A Libra Sun standing on its own two feet
The growth, then, is becoming a whole person before the partnership rather than through it - willing to disappoint someone occasionally and survive it, willing to sit with a little conflict for the sake of honesty. A Libra Sun who manages that turns formidable: fair-minded, genuinely kind, able to see every angle, and a natural at bringing people together without dissolving into them. The relatedness was never the flaw. Keeping it while standing on its own two feet is the whole art.