It is sometimes best to slip over thoughts and not go to the bottom of them.
(Il faut glisser sur les pense?s et ne pas les approfondir.)
Source: Letters of Madame de Sevigne to Her Daughter and Friends, 1811.
-- Marie de Sevigne, (Feb 5 1626-1696), French diarist; She was a prolific correspondent whose 1700 letters to her daughter reflected the social history of the reign of Louis XIV.