The world is what the saints and the prophets saw it was; it is not merely getting better or merely getting worse; there is one thing that the world does; it wobbles. Left to itself, it does not get anywhere; though if helped by real reformers of the right religion and philosophy, it may get better in many respects, and sometimes for considerable periods. But in itself it is not a progress; it is not even a process; it is the fashion of this world that passeth away. Life in itself is not a ladder; it is a see-saw.
Now that is fundamentally what the Church has always said; and for about four hundred years has been more and more despised for saying. The Church never said that wrongs could not or should not be righted; or that commonwealths could not or should not be made happier; or that it was not worth while to help them in secular and material things; or that it is not a good thing if manners become milder, or comforts more common, or cruelties more rare. But she did say that we must not count on the certainty even of comforts becoming more common or cruelties more rare; as if this were an inevitable social trend towards a sinless humanity; instead of being as it was a mood of man, and perhaps a better mood, possibly to be followed by a worse one. We must not hate humanity, or despise humanity, or refuse to help humanity; but we must not trust humanity; in the sense of trusting a trend in human nature which cannot turn back to bad things. “Put not your trust in princes; nor in any child of man.” That is the precise point of this very practical sort of politics. Be a Royalist if you like (and there is a vast amount to be said, and a vast amount being said, just now, for more personal and responsible rule); try a Monarchy if you think it will be better; but do not trust a Monarchy, in the sense of expecting that a monarch will be anything but a man. Be a Democrat if you like (and I shall always think it the most generous and the most fundamentally Christian ideal in politics); express your sense of human dignity in manhood suffrage or any other form of equality; but put not your trust in manhood suffrage or in any child of man. There is one little defect about Man, the image of God, the wonder of the world and the paragon of animals; that he is not to be trusted. If you identify him with some ideal, which you choose to think is his inmost nature or his only goal, the day will come when he will suddenly seem to you a traitor.
– The Well and the Shallows (1935).