Snagged via Gyler’s The Company They Keep (p.215):
Much was possible to a man in solitude…But some things were possible only to man in companionship, and of these the most important was 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.
-Charles Williams, The Place of the Lion, p.187