The easiest way to save face is to keep the lower half shut. – Author Unknown

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

Basically you are like two parallel lines which never meet. Dialogue seems to be impossible. All is monologue — you are talking to yourself and the other is talking to himself. Two monologues together look like a dialogue only in appearance. – Osho, The Revolution: Talks on Kabir, 1979