Francis de Sales
Saint Francis de Sales (French: Saint François de Sales) (21 August 1567 – 28 December 1622) was bishop of Geneva and a Roman Catholic saint. He worked to convert Protestants back to Catholicism, was an accomplished preacher, and wrote books on religious topics.
Discourse
@ A good discourse is that from which nothing can be retrenched without cutting into the quick.
St. Francis de Sales, Letter upon Eloquence
http://en.wikiquote.org/wiki/Francis_de_Sales