Drawing on my fine command of language, I said nothing. – Attributed to Robert Benchley by Evan Esar in 1949, however a similar saying alr

It is impossible to speak in such a way that you cannot be misunderstood. – Karl Popper, Unended Quest

And there is monologue disguised as dialogue, in which two or more men, meeting in space, speak each with himself in strangely tortuous and circuitous ways and yet imagine they have escaped the torment of being thrown back on their own resources. – Martin Buber (1878—1965), translated from German