Grace.

Caravaggio, Narcissus, 1600

Humility, which Burke ranked high among the virtues, is the only effectual restraint upon this congenital vanity; yet our world has nearly forgotten the nature of humility. Submission to the dictates of humility formerly was made palatable to man by the doctrine of grace; that elaborate doctrine has been overwhelmed by modern presumption.

Russell Kirk, from The Conservative Mind