Every day I add to the list of things I refuse to discuss. The wiser the man, the longer the list.

[Tous les jours j’accrois la liste des choses dont je ne parle plus. Le plus philosophe est celui dont la liste est la plus longue.]

Nicolas Chamfort (1741-1794) French writer, epigrammist (b. Nicolas-Sébastien Roch)

Products of Perfected Civilization [Produits de la Civilisation Perfectionnée], Part 2 “Characters and Anecdotes [Caractères et Anecdotes],” ch. 7 (1795) [tr. Parmée (2003)]
    (Source)

Quoting someone reacting to a request to expound on "various public and private abuses" he had received.

(Source (French)). Alternate translation:

Every day I add to the list of things which I will no longer discuss. The more of a philosopher one is, the longer one's list.
[tr. Merwin (1969)]