A quote
What fear is there that thy dogmata, or philosophical resolutions and conclusions, should become dead in thee, and lose their proper power and efficacy to make thee live happy, as long as those proper and correlative fancies, and representations of things on which they mutually depend (which continually to stir up and revive is in thy power,) are still kept fresh and alive?
Marcus Aurelius·Meditations 7.2·trans. Long