"I consider it a good rule for letter writing to leave un-mentioned what the recipient already knows, and instead tell him something new."According to the Psychoanalytical Electronic Publishing Web site, neurologist and psychologist Sigmund Freud wrote the above sentence to his friend and fellow doctor Wilhelm Fliess on April 14, 1898. It may or may not take an expert to determine why he wrote this immediately following that sentence:
"I shall therefore not comment on what I heard: that you had a bad time at Easter; you know this anyway. I would rather tell you about my Easter vacation, which I spent in a grumpy mood but from which I returned refreshed."It seems a little mean, to me, to mention Fliess' bad time. In my opinion, he adds insult to injury by going on to describe his own delightful trip at Easter.
Of course, I don't know the whole story. I just came across the quote of Freud's about letter writing and found the rest of the letter while doing a bit of research. The quote about writing something new seems like a good idea, though.