There are strings in the human heart that had better not be vibrated.
Source: Mr. Tappertit, in Barnaby Rudge, ch. 22, 1841.
-- Charles Dickens, (Feb 7 1812-1870), English novelist, dramatist; He was one of most prolific and popular English novelists, e.g., A Christmas Carol, 1843 & Tale of Two Cities, 1859.