Even those to whom Providence has allotted greater strength of understanding, can expect only to improve a single science. In every other part of learning, they must be content to follow opinions, which they are not able to examine; and, even in that which they claim as peculiarly their own, can seldom add more than some small particle of knowledge, to the hereditary stock devolved to them from ancient times, the collective labour of a thousand intellects.
Samuel JohnsonThe luster of diamonds is invigorated by the interposition of darker bodies; the lights of a picture are created by the shades; the highest pleasure which nature has indulged to sensitive perception is that of rest after fatigue.
Samuel Johnson