Teachers may think they are stuffing minds, but all they are ever affecting is the memory. Nothing can ever be forced into anyone's mind except by brainwashing, which is the very opposite of genuine teaching.
Mortimer AdlerSin is not only manifested in certain acts that are forbidden by divine command. Sin also appears in attitudes and dispositions and feelings. Lust and hate are sins as well as adultery and murder. And, in the traditional Christian view, despair and chronic boredom - unaccompanied by any vicious act - are serious sins. They are expressions of man's separation from God, as the ultimate good, meaning, and end of human existence.
Mortimer Adler