“Never criticize, unless you can do a better job.”
“Never leave a job unfinished, unless you are unable to finish it.”
“Unless you think you can do better than Tolstoy, we don’t need you.”
“Why compare yourself with others? No one in the entire world can do a better job of being you than you.”
“Not every change is an improvement but every improvement is a change; you can't do anything BETTER unless you can manage to do it DIFFERENTLY, you've got to let yourself do better than other people!”
“Move not unless you see an advantage; use not your troops unless there is something to be gained; fight not unless the position is critical.”