Even preachers have the habit of so framing their sermons as to displease nobody. Their intentions are good and their activities splendid, but they do not persuade very many to amend their lives. Why?

Is it that there are so few who are led by sermons to abstain from public sin? Do you know what I think? It is because preachers have too much worldly wisdom. They do not fling all restraint aside and burn with the great fire of God, as the Apostles did; and so their flames do not throw out much heat. I do not say that their fire could be as great as the Apostles', but I wish they had more than they have.

--St Teresa of Avila. Life, Ch.16