I like how Robert Wilkinson puts it here in Aquariuspapers.com:
Mythologically, Libra is in the axis of the Relator, or Lover. This sign (along with its polar opposite, Aries) repotentializes the dance of relationship between self and others begun in Aries. Libra shows us how to be refined and gracious as we interact with others.
It is the part of us willing to dance with others' points of view, seeing other perspectives, and basically just being diplomatic and pleasant. Libra’s reasonableness and moderation are healthy antidotes for the stubborn selfish extremism that seems so prevalent today.
Libra, when freed of the traps of superficiality, vanity, extravagance, timidity, indecisiveness, vacillation, impatience, and getting too theoretical, demonstrate a harmonious, cooperative, agreeable impartial consideration for others that brings a greater sense of belonging to everyone involved.
They are born peacemakers and mediators, and see the ten thousand ways we can all get along if everyone just gives a little bit. They are expressive, modest, inspirational, creative, appreciative, romantic and artistic. The sign of Libra has given us some of the greatest icons of history.
Think Mohandas K. Gandhi, master politician, revolutionary, statesman and “mahatma,” or Great Spirit. He led his country to independence from Great Britain through demonstrating the practical efficacy of the doctrine of “non-violence,” or ahimsa, applied through the power of satyagraha, or “Soul-force.”