"Preach, saying, The kingdom of heaven is at hand. ...when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak. For it is not ye that speak, but the Spirit of your Father which speaketh in you." The MOST important task for any God-called minister is to speak everything God has revealed by His word.
Matthew 10:27 - "What I tell you in darkness, that speak ye in light: and what ye hear in the ear, that preach ye upon the housetops."