One of my favorite bits from G.K. Chesterton (and which I've blogged about many times). From Ch. 8 of his work, The Ball and the Cross:
In the book, MacIan continues:
Christianity is always out of fashion because it is always sane; and all fashions are mild insanities. When Italy is mad on art the Church seems too Puritanical; when England is mad on Puritanism the Church seems too artistic. When you quarrel with us now you class us with kingship and despotism; but when you quarrelled with us first it was because we would not accept the divine despotism of Henry VIII. The Church always seems to be behind the times, when it is really beyond the times; it is waiting till the last fad shall have seen its last summer. It keeps the key of a permanent virtue.