Tact in audacity is knowing how far you can go without going too far.
Variants
Tact in audacity consists in knowing how far we may go too far.
An artist cannot speak about his art any more than a plant can discuss horticulture.
I have a piece of great and sad news to tell you: I am dead.
Quote text and notes from Wikiquote: Jean Cocteau (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.