I was right when I said a very long time ago that our age would leave few living documents behind it: it was rare for anyone to keep a diary, letters were short and businesslike--"I'm alive and well"--and few memoirs were written. There are many reasons for this. Let me mention just one, not perhaps recognized by everybody: we were too often at loggerheads with our own past to give it proper thought. Within the half-century, our ideas on people and events have changed many times; conversations were broken off in mid-sentence; thoughts and feelings could not but be affected by circumstances.