"A good preacher should have these properties and virtues: first, to teach systematically; second he should have a ready wit; thirdly, he should be eloquent, fourthly, he should have a good voice; fifthly, a good memory, sixthly, he should know when to make an end; seventhly, he should be sure of his doctrine; eighthly, he should venture and engage body and blood, wealth and honour, in the world; ninethly, he should suffer himself to be mocked and jeered of everyone."
[Luther's table-talk, of preachers, cccc.]