movement in balance

No mind was so good that it did not need another mind to counter and equal it, and to save it from conceit and blindness and bigotry and folly. Only in such a balance could humility be found, humility which was a lucid speed to welcome lucidity whenever and wherever it presented itself. How much he owed to Quentin! How much — not pride but delight urged the admission — Quentin owed to him! Balance — and movement in balance, as an eagle sails up on the wind — this was the truth of life, and beauty in life.

-- Charles Williams The Place of the Lion