"I think truly, that no man preaches that sermon well to others, that doth not first preach it to his own heart. He who doth not feed on, and digest, and thrive by what he prepares for his people, he may give them poison as far as he knows; for, unless he finds the power of it in his own heart, he cannot have any ground of confidence, that it will have power in the hearts of others." (John Owen, "The Duty of a Pastor") .
The lamp-posts are poetical...the lamp-post really has the whole poetry of man, for no other creature can lift a flame so high and guard it so well. --G K Chesterton, London Times July 24, 1909.