"I was already a confirmed anti-Stalinist at the age of seventeen .... The idea of killing Stalin filled my thougths and feelings .... We studied the 'technical' possibillities of an attack .... We even practiced. If they had condemned me to death in 1939, their decision would have been just. I had made up a plan to kill Stalin; wasn't that a crime? When Stalin was still alive, I saw things differently, but as I look back over this century, I can state that Stalin was the greatest individual of this century, the greatest political genius. To adopt a scientific attitude about someone is quite different from one's personal attitude."
January 1, 1970
https://en.wikiquote.org/wiki/Joseph_Stalin