A politician must often talk and act before he has thought and read. He may be very ill informed respecting a question: all his notions about it may be vague and inaccurate; but speak he must. And if he is a man of ability, of tact, and of intrepidity, he soon finds that, even under such circumstances, it is possible to speak successfully.

Critical and Historical Essays Contributed to the Edinburgh Review (ed. 1843)