"Nature sets her gifts on the right hand and on the left. Those conditions that flatter hope and attract desire are so constituted that, as we approach one, we recede from another. There are goods so opposed that we cannot sieze both, but, by too much prudence, may pass between them at too great a distance to reach either. This is often the fate of long consideration; he does nothing who endeavors to do more then is allowed to humanity. Flatter not yourself with contrarities of pleasure. Of the blessings set before you make your choice, and be content. No man can taste the fruits of Autumn while he is delighting his scent with the flowers of Spring: no man can, at the same time, fill his cup from the source and from the mouth of the Nile."
"Rasselas, Prince of Abyssinia" (1759)
Samuel Johnson is most famous as the creator of the most esteemed of all English dictionaries in the 18th century, but he was also an early leader of the abolitionist movement in England, another reason why Welles may have admired him enough to quote him on such an important occasion. Rassalas was his only novel. I confess I've never read it, but it concerns a young prince who escapes from a life of pampered but stupefying luxury in order to experience both the highs and lows of life. The prince's gilded bondage in a palace has been compared to Xanadu, the prison-like pleasure dome in Coleridge's Kubla Kahn, which also inspired parts of Citizen Kane.