The first law of dietetics seems to be: if it tastes good, it's bad for you. Isaac Asimov
I think it's bad to talk about one's present work, for it spoils something at the root of the creative act. It discharges the tension. Norman Mailer
It's bad policy to speculate on what you'll do if a plan fails, when you're trying to make a plan work. Condoleezza Rice
It's bad manners to talk about ropes in the house of a man whose father was hanged. Irish Proverb
It's bad combing where there is no hair. Dutch Proverb
If it is good then the deed is more important than the intention; if it's bad then the intention is worse than the deed. Spanish Proverb