There is another source of power which I can hardly think of as a separate quality, but rather as the sum and result of all the qualities which I have been naming. I mean Courage. It is the indispensable requisite of any true ministry. The timid minister is as bad as the timid surgeon. Courage is good everywhere, but it is necessary here. If you are afraid of men and a slave to their opinion, go and do something else. Go and make shoes to fit them. Go even and paint pictures which you know are bad but which suit their bad taste. But do not keep on all your life preaching sermons which shall say not what God sent you to declare, but what they hire you to say. Be courageous. Be independent.
—Philip Brooks (1835-1893), from his Lectures on Preaching: