When one has arrived at that point that he does not sin with the tongue he is perfect, according to the Holy Spirit. This is why we must speak little and well -- little and with simplicity, with charity, and in a manner that will make virtue appear amiable.
-- St. Francis de Sales
St. Aloysius Gonzaga, before speaking, with fervor addressed to God this prayer of the prophet: "Lord, place a guard over my lips."