Philip Stanhope, 4th Earl of Chesterfield

Use palliatives when you contradict; such as I MAY BE MISTAKEN, I AM NOT SURE, BUT I BELIEVE, I SHOULD RATHER THINK, etc. Finish any argument or dispute with some little good-humored pleasantry, to show that you are neither hurt yourself, nor meant to hurt your antagonist; for an argument, kept up a good while, often occasions a temporary alienation on each side.