The correct quote is "a foolish consistency." And the context of the quote has nothing to do with self-discipline. It is a call to boldly speak the truth today,

The correct quote is "a foolish consistency." And the context of the quote has nothing to do with self-discipline. It is a call to boldly speak the truth today, and then boldly do the same tomorrow. If you contradict yourself, then so be it. The truth might not be found in only making logically consistent statements. "To be great is to be misunderstood."