Mistakes are almost always of a sacred nature. Never try to correct them. On the contrary: rationalize them, understand them thoroughly. After that, it will be possible for you to sublimate them.
“If a dog doesn't put you first where are you both? In what relation? A dog needs God. It lives by your glances, your wishes. It even shares your humor. This happens about the fifth year. If it doesn't happen you are only keeping an animal.”
“Very often we developed a better grasp of the subjects than the over worked teachers.”