If you are idle, be not solitary; if you are solitary, be not idle.
Source: Letter, 27 Oct. 1779, to James Boswell. Quoted in: James Boswell, Life of Samuel Johnson (1791).
-- Samuel Johnson, (Sep 18 1709-1784), English lexicographer, critic; He was remembered for writing the first critique of Shakespeare, 1765 and Dictionary of the English Language, 1755.