"Innocent, sensible that this flagrant usurpation [appointing his man Archbishop of Canterbury] would be highly resented by the court of England, wrote [King] John a mollifying letter; sent him four golden rings set with precious stones; and endeavoured to enhance the value of the present, by informing him of the many mysteries implied in it. He begged him to consider seriously the form of the rings, their number, their matter, and their colour. Their form, he said, being round, shadowed out Eternity, which had neither beginning nor end; and he ought thence to learn his duty of aspiring from earthly objects to heavenly, from things temporal to things eternal. The number four, being a square, denoted steadiness of mind, not to be subverted either by adversity or prosperity, fixed for ever on the firm basis of the four cardinal virtues. Gold, which is the matter, being the most precious of metals, signified Wisdom, which is the most valuable of all accomplishments, and justly preferred by Solomon to riches, power, and all exterior attainments. The blue colour of the saphire represented Faith; the verdure of the emerald, Hope; the redness of the ruby, Charity; and the splendor of the topaz, Good Works. By these conceits, Innocent endeavoured to repay John for one of the most important prerogatives of his crown, which he had ravished from him; conceits probably admired by Innocent himself. For it is easily possible for a man, especially in a barbarous age, to unite strong talents for business with an absurd taste for literature and in the arts." - Ibid.
(John was not impressed.)