A more difficult duty is that of passing judgment (as a Christian is often bound to do) on events of the day and public men. It becomes his duty, in proportion as he has station and influence in the community, in order that he may persuade others to think as he does. Above all, clergymen are bound to form and pronounce an opinion. It is sometimes said, in familiar language, that a clergyman should have nothing to do with politics. This is true, if it be meant that he should not aim at secular objects, should not side with a political party as such, should not be ambitious of popular applause, or the favour of great men, should not take pleasure and lose time in business of this world, should not be covetous. But if it means that he should not express an opinion and exert an influence one way rather than another, it is plainly unscriptural. Did not the Apostles, with all their reverence for the temporal power, whether Jewish or Roman, and all their separation from worldly ambition, did they not still denounce their rulers as wicked men, who had crucified and slain the Lord's Christ? and would they have been as a city on a hill if they had not done so? If, indeed, this world's concerns could be altogether disjoined from those of Christ's Kingdom, then indeed all Christians (laymen as well as clergy) should abstain from the thought of temporal affairs, and let the worthless world pass down the stream of events till it perishes; but if (as is the case) what happens in nations must affect the cause of religion in those nations, since the Church may be seduced and corrupted by the world, and in the world there are myriads of souls to be converted and saved, and since a Christian nation is bound to become part of the Church, therefore it is our duty to stand as a beacon on a hill, to cry aloud and spare not, to lift up our voice like a trumpet, and show the people their transgression, and the house of Jacob their sins. And all this may be done without injury to our Christian gentleness and humbleness, though it is difficult to do it. We need not be angry nor use contentious words, and yet may firmly give our opinion, in proportion as we have the means of forming one, and be zealous towards God in all active good service, and scrupulously and pointedly keep aloof from the bad men whose evil arts we fear.
--John Henry Newman, "Profession without Ostentation," in Parochial and Plain Sermons, Volume 1, Sermon 12