Rasselas

Those conditions, which 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 seize 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 than is allowed to humanity. Flatter not yourself with contrarieties 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 the spring: no man can, at the same time, fill his cup from the source and from the mouth of the Nile.